By the end of the year, scholars of security studies will be able to use a new website to learn how terrorist and militant organizations evolve over time and how they collaborate with--and compete against--one another.

"Mapping Terrorist Organizations," an interdisciplinary online project headed by CISAC Senior Fellow Martha Crenshaw, will focus initially on providing detailed, annotated information on militant and terrorist groups operating in Iraq since 2003, Pakistan and Afghanistan--areas of current policy concern for the United States. Future plans involve expanding research to include groups in Latin America, Europe, the Middle East and the United States and, if time and resources permit, to include major historical groups such as the Russian revolutionary movement.

The three-year project is funded by a $500,000 grant awarded to Crenshaw last fall by the National Science Foundation. It is part of the Department of Defense's Minerva Initiative launched in 2008 to support "research related to basic social and behavioral science of strategic importance to U.S. national security policy."

"No such study exists in the literature of terrorism," Crenshaw wrote in a report on the project. "Evolutionary mapping can enhance our understanding of how terrorist groups develop and interact with each other and with the government, how strategies of violence and non-violence are related, why groups appear and disappear, and how opportunities and constraints in the environment change organizational behavior over time." Furthermore, Crenshaw noted that visual mapping of highly complex, shifting information is likely to stimulate new observations that might otherwise have been overlooked."

Student involvement

Daniel Cassman, a 2010 CISAC honors graduate in political science and computer science, is building the site, which will contain interactive timelines, family trees and detailed group profiles. Cassman's programming--developed specifically for the website--will allow scholars to better understand and analyze patterns and structures of violent and non-violent opposition groups in multiple contexts.

At a June 1 meeting of a half dozen students working on the project, Crenshaw said one of the most challenging problems facing researchers is documenting how terrorist organizations evolve over time. With no official sources to rely on, Crenshaw's team spent the last year combing through government documents and academic research, autobiographies, newspaper reports and even jihadist websites-many of which disappear as quickly as they pop up. Crenshaw acknowledges that "precision in this field is elusive" even though the project emphasizes using documented primary sources. Students working on the project include Christy Abizaid and Sadika Hameed, 2010 graduates of the International Policy Studies master's program, and undergraduates Rob Conroy, Asfandyar Mir and Ari Weiss. CISAC staff member Julia McKinnon is assisting Crenshaw as well.

"We're keenly interested in changes in the sizes of groups," Crenshaw said. "That's one of the hardest things to figure out." It also is difficult to know when a group dissolves, becomes dormant or morphs into something else, she said. To obtain as complete a profile as possible, the website will include information about failed and foiled plots, as well as successful attacks, she said.

Charles Nicas, a student in International Policy Studies and Public Policy, said he joined Crenshaw's project to learn more about militancy and terrorism in South Asia. "The U.S. presence in Afghanistan and the fact that Pakistan is a nuclear-armed country mean that the U.S. will be involved in this region...for a long time," he wrote in an email. "The complexity of the situation takes a lot of research to understand."

Nicas's area of work focuses on sectarian groups in Pakistan, mainly Sipah-e-Sahaba Pakistan (SSP) and its offshoot Lashkar-e-Jhangvi (LeJ), both virulently anti-Shia groups. Nicas said SSP was founded in 1985 with state support and spawned LeJ in the mid-1990s. The groups are based in Punjab province in eastern Pakistan but had a significant presence in neighboring Afghanistan during Taliban rule. Both have become increasingly allied with militant groups in the border region, including al-Qa'ida, and are part of an umbrella group known as the Punjabi Taliban. "I've been surprised to learn how far back the roots of this problem go, which makes the challenge of effectively countering it especially daunting," Nicas said.

Terrorist organizations profiled

In addition to Afghanistan and Pakistan, Crenshaw's website will feature profiles of the following groups:

• 1920s Revolution Brigades
• Mujahideen Army
• Islamic Army in Iraq
• Ansar al-Islam
• Al-Qa'ida in Iraq

Group profiles include the following attributes:

• The group's name, including pseudonyms and name changes
• A history with a timeline, including whether the group is active, dormant or disbanded
• The group's goals/ideology
• Key leaders
• Group size (by date)
• Resources in the form of money and weapons
• Outside intervention and influence
• Dates of first and last known attacks
• Targets
• Area of Operations
• Tactics
• Political activities (by date)
• Key operational experiences (by date)
• Known splinter groups (by date)
• Relationship to other groups (by date)
• Relationship with surrounding population/popular support
• Defining characteristics/Major events

William J. Perry, former secretary of defense, and Siegfried S. Hecker, former director of Los Alamos National Laboratory, have joined forces to launch the Nuclear Risk Reduction initiative to address the changing nuclear threat following the end of the Cold War and the rise of international terrorism. The project is based at the Center for International Security and Cooperation (CISAC), which Hecker co-directs.

"I have worked with Sig for many years, both inside and outside government," Perry said. "I am particularly pleased to have such an able collaborator on this effort, which I have said is the work to which I will dedicate the rest of my career."

Hecker said he is excited to work with Perry to reduce the global nuclear threat. "Our primary objectives will be to work toward a world with fewer weapons, to have fewer fingers on the nuclear trigger and to keep nuclear weapons and materials out of the wrong hands," he said. "Time is of the essence both because of the urgency of the threat and because of the renewed hope that major powers are willing to take serious steps to realize these goals."

Hecker and Perry, both giants in the field of nuclear defense and security, plan to bring their considerable experience and associations with the U.S. and international policy, military and scientific communities to achieve these objectives.

The Nuclear Risk Reduction initiative (NRR) builds on the work of the Preventive Defense Project (PDP) that was established at Stanford and Harvard 13 years ago under the leadership of Perry and Ashton B. Carter, a former assistant secretary of defense in the Clinton administration. The two men, during their time in government, tackled some of the most important security issues following the breakup of the Soviet Union through promoting the concept of preventive defense, which seeks to diminish the possibility of potential threats escalating into actual threats and conflict. Carter is serving currently in the Obama administration as undersecretary of defense for acquisition, technology and logistics.

Hecker, as director of Los Alamos, was instrumental in creating the U.S. nuclear weapons stockpile stewardship program to meet the challenges of the post-Cold War environment without nuclear testing. He also helped reduce the nuclear threat posed by Russia and other republics in the chaotic years that followed the breakup of the Soviet Union. At Stanford, he has expanded his activities to include work in Northeast Asia, South Asia and the Middle East.

NRR's three-prong approach for making the world a safer place:

1. Working toward a world free of nuclear weapons

Perry, along with former secretaries of state George Shultz and Henry Kissinger, and former Sen. Sam Nunn, launched a joint effort in 2007 to refocus world attention on the critical need to eliminate nuclear weapons, starting with practical measures to make the world a safer place. President Obama, who has embraced this vision, has begun to adopt policies that will move the United States in this direction. The New Strategic Arms Reduction Treaty (New START), signed April 8, 2010, by Obama and Russian President Dmitry Medvedev, reduces the number of strategic arsenals in each country to 1,550 warheads. Now Perry and Hecker, through NRR, are conducting a risk/benefit analysis of ratification of the Comprehensive Test Ban Treaty (CTBT), another critical piece of legislation linked to nuclear weapon reductions. They will also explore with Russian colleagues deeper cuts in their respective nuclear arsenals along with engaging other nuclear weapons states on such critical issues.

2. Preventing proliferation of nuclear weapons

Perry and Hecker believe the risk of using nuclear weapons increases as more countries acquire them. Much of their focus is on the nuclear programs in North Korea and Iran, both of which threaten international peace and stability. In addition, as more states possess nuclear weapons and materials, it will become increasingly likely that fissile materials for an improvised nuclear device could fall into the hands of sub-national groups or terrorists.

Meanwhile, if there is to be a global renaissance of nuclear power, nations must learn how to manage potential proliferation risks associated with nuclear reactors and their fuel cycles. This is particularly critical if nuclear power spreads to developing countries that have expressed interest in this form of energy, since many have neither the requisite technological basis nor political stability to guarantee security.

3. Preventing nuclear terrorism

The 2010 Nuclear Security Summit in Washington, D.C. highlighted the importance of keeping nuclear weapons out of the hands of terrorists. As President Obama stated, "It is increasingly clear that the danger of nuclear terrorism is one of the greatest threats to global security-to our collective security." Despite this, some nations view the terrorist threat with less alarm. NRR plans to engage the technical and military leadership in key countries to promote a common understanding of the dangers posed by such threats and what steps are needed to mitigate them.

President Obama also warned, "Nuclear materials that could be sold or stolen and fashioned into a nuclear weapon exist in dozens of nations." Harvard's Graham Allison stated if countries could, "Lock down all nuclear weapons and bomb-usable material as securely as gold in Fort Knox, they [could] reduce the likelihood of a nuclear 9/11 to nearly zero." During the Nuclear Summit, Obama announced a goal to "lock down" all nuclear materials by 2014. This is a laudable objective, but Perry and Hecker know it will require much more than physical security to protect nuclear sites worldwide. The two men will work toward a cooperative, global effort to help countries develop modern, comprehensive nuclear safeguard systems that can provide proper control and accounting, along with physical protection.

Hecker has experience regarding such work. In 1994, he initiated a nuclear materials protection, control and accounting program (the lab-to-lab program) with Russia's nuclear complex. Perry and Hecker, through NRR, plan to reinvigorate and broaden the scientific cooperation that existed between the United States and Russia in the 1990s. Moreover, they plan to collaborate with the technical, military and policy communities in key countries to realize NRR's ambitious agenda of making the world a safer and more secure place.

U.S. Ambassador to the United Nations and former FSI Advisory Board member Susan Rice '86 urged Stanford's graduating class to fight global poverty, conflict, and repression, saying "These massive disparities erode our common security and corrode our common humanity." Conflict-ridden states not only cause suffering for their people, she noted. "Poor and fragile states can incubate threats that spread far beyond borders -- terrorism, pandemic disease, nuclear proliferation, criminal networks" and more. "In our interconnected world," she said, " a threat to development anywhere is a threat to security everywhere."

When Susan Rice graduated from Stanford in 1986, the Soviet Union was a formidable foe, China barely registered on the global economic scene and the first computer laptops – weighing in at 12 pounds each – were just hitting the market.

And if someone had told her that she'd serve in the Cabinet of the country's first black president as ambassador to the United Nations, "I would've asked them what they were smoking."

But in her remarks delivered during Stanford University's 119th Commencement on Sunday, Rice put the advances of the past 24 years in perspective. She called the fight against global poverty "not only one of the great moral challenges of all time, but also one of the great national security challenges of our time."

"The planet is still divided by fundamental inequalities," she said. "Some of us live in peace, freedom and comfort while billions are condemned to conflict, poverty and repression. These massive disparities erode our common security and corrode our common humanity."

While she did not discuss any specifics of her role as the country's ambassador to the United Nations or the organization's recent move to impose a fourth round of sanctions on Iran, Rice did talk about the link between poverty and security.

"When a country is wracked by war or weakened by want, its people suffer first. But poor and fragile states can incubate threats that spread far beyond borders – terrorism, pandemic disease, nuclear proliferation, criminal networks, climate change, genocide and more. In our interconnected age, a threat to development anywhere is a threat to security everywhere."
-Ambassador Susan Rice

Rice's address marked a very public return to Stanford. She graduated with a bachelor's in history from the university as a junior Phi Beta Kappa and Truman Scholar in 1986.

She was confirmed as ambassador to the United Nations in 2009 after being nominated by President Obama. It was a job that followed her role as Obama's senior adviser for national security affairs during his presidential campaign in 2007 and 2008. Before that, she served as the country's assistant secretary of state for African affairs and as a special assistant to President Clinton. She was also a senior director for African affairs at the National Security Council.

During a trip to a displaced persons camp in war-torn Angola in 1995, Rice saw firsthand the global poverty she talked about on Sunday. Of all the people she saw in the camp, she said one of her most striking memories is the smile she received from a malnourished little boy when she gave him her baseball cap.

But she's haunted by thoughts of what may have happened to him.

"I had to leave that camp," she said. "And when I did, I left that little boy in hell. I like to think, and I sure hope, that kid is OK. But he could well have become one of the 9  million children under the age of 5 who die each year from preventable and treatable afflictions."

And that boy, she said, should be a symbol to Stanford's graduates of the challenges that face them and the good they can do in the world.

"That little boy's future is tied to ours," she said. "Our security is ultimately linked to his well-being. So we must shape the world he deserves."

Rice's weighty remarks still left room for graduation levity. And the student procession – known as the Wacky Walk – showcased much of it.

The graduates hit the field of Stanford Stadium with balloons and signs thanking mom and dad. They were dressed as Egyptian kings and Vikings, wizards and butterflies. Some wore bathing suits and flowing togas. Others covered up with costumes paying homage to the pop culture past of Pac-Man, as well as more timeless pursuits like dominoes and poker.

It was a final blast of carefree fun for college students about to contend with an uncertain job market.

"We have everything we need on campus," said Tyler Porras, a graduating biology major who took to the field with a bolo tie and black cowboy hat. "Now it's off to the real world where you need to find a job."

The ceremony marked the award of 1,722 bachelor's degrees, 2,100 master's degrees and 980 doctoral degrees.

Departmental honors were awarded to 365 seniors, and 272 graduated with university distinction. Another 74 graduated with multiple majors and 33 received dual bachelor's degrees. There were 110 graduates receiving both bachelor's and master's degrees.

Among international students, there were 102 undergraduates from 45 countries other than the United States, and 955 graduate students from 75 foreign countries.

"As you leave Stanford, I hope you carry a deep appreciation of the values and traditions that are everlasting, as well as a willingness to be bold and to approach challenges with a fresh perspective," Stanford President John Hennessy told the graduates.

The day also gave parents a time to beam and brag.

"These kids have the potential to contribute so much to the world," said Tim Roake, whose daughter, Caitlin Roake, is graduating as a biology major and is planning to join the Peace Corps.

Roake and his wife, Kathleen Gutierrez, had front-row seats in the stadium bleachers next to Dave and Lori Gaskin. Their son, Greg, has been dating Caitlin Roake since their freshman year.

"The last four years for Greg have been such an enriching experience from an academic perspective but also on a personal level," Lori Gaskin said. "I attribute that not only to the university but the wonderful people he's met and the relationships he's made."

 

Stanford seniors Sam Stone and Ashley Lohmann have been awarded the Firestone Medal and Perry Prize, respectively, for their theses on energy import dependence and the Jihadist terrorist threat to the United States since 9/11.

Stone and Lohmann discussed their findings during a CISAC seminar on June 2. Their papers are available below.

The Firestone Medal for Excellence in Undergraduate Research recognizes the top 10 percent of all honors theses in social science, science and engineering. The William J. Perry Prize is awarded to a student for excellence in policy-relevant research in international security studies. Both recipients are students in CISAC's Undergraduate Honors Program in International Security Studies, directed this year by Senior Fellow Stephen J. Stedman and Thomas Fingar, the Oksenberg/Rohlen Fellow.

Sam Stone, a student in the Department of Mathematics and Program in International Relations, wrote "Gas & Geopolitics: The Foreign Policy Implications of Energy Import Dependency."

Stone's thesis abstract states: "In recent years, much attention has focused on the dangers of dependency on energy imports. Fears of energy import dependency are particularly acute in Eastern Europe, where most countries remain heavily dependent on Russian gas, but similarly dependent relationships exist across the globe. Most energy security research focuses on exporters; this thesis contributes to the study of energy security by exploring the effects of energy dependence on importers."

During 2010-11 academic year, Stone, as a Fulbright Fellow, will study Russian foreign policy, in particular energy security issues and nuclear nonproliferation efforts at Moscow State University. He also plans to continue working with the Stanford US-Russia Forum, an initiative that brings together American and Russian students to explore global issues.

Ashley Lohmann, a student in the Program in International Relations, wrote, "Jihad on Main Street: Explaining the Threat of Jihadist Terrorism to the American Homeland since 9/11."

Lohmann's abstract states: "Since September 11, 2001, 26 jihadist plots and attacks have targeted the American homeland, but because the details of the plots and attacks as well as the profiles of their perpetrators vary greatly, scholars, government officials, and other authorities still disagree about the seriousness of threat posed by jihadist terrorism to the United States. This study provides a clearer understanding of the nature of jihadist terrorism in the U.S. by examining all 26 plots and attacks in detail. It concludes that jihadist terrorism is generally a minimally threatening, homegrown phenomenon, but some plots and attacks still emerge that do pose a serious threat to U.S. national security."

Stedman and Fingar described the award-winning theses as the very best in an exceptionally strong field of submissions by members of this year's honor's class.  "Sam Stone's creative and rigorous use of case studies and 'large N' data to to examine hypotheses about the effects of energy dependence gives decision makers theoretical and empirical tools to anticipate and ameliorate unwanted consequences of dependence on foreign sources of oil and gas," Fingar said. "Ashley Lohmann's rigorous examination of factors contributing to the success or failure of Jihadist threats to the American homeland provides valuable insights on the magnitude and character of such threats and how best to address them. These were the best, but other theses were also worthy of special recognition and we learned much from the work of every member of the class."

The Obama administration's decision to preview its National Security Strategy at West Point highlighted its coverage of security crises from Afghanistan to North Korea. But back-to-back events at Brookings with Hillary Clinton and Samantha Power today showed that the core of the strategy is a deeper argument about the central challenge confronting America -- the increased impact on our economy and security of a new global reality.

For two decades, the United States could take economic and security supremacy for granted. Three things have changed.

First, the global economic boom. Yes, boom -- remember? Before the crash, there were two decades of uninterrupted growth in the global economy, global trade, and global financial activity. The U.S. profited, but so too did China, India and Brazil, which grew into major economic players; so did several others, like Mexico, Indonesia and Turkey, which have emerged as the new middle powers.

Second, the Iraq war. Love or loath U.S. policy in Iraq, it launched us into sustained expenditure of financial and military resources alongside another draining war in Afghanistan. In the minds of the Vulcans, decisive U.S. victory in Iraq was to assert global order by force of -- well, force. The strategy backfired, and rising states from Ankara to Brasilia found few, if any, costs to opposing U.S. strategy in the Middle East -- and domestic political points to be won. The Obama administration is feeling the consequences in its Iran policy.

Third, the global financial crisis. The bust, when it came, reaffirmed the centrality of the U.S. in the short term. But it also showcased the growing weight of the emerging economies, which now lead the global recovery. Before Lehman Brothers collapsed, other big players may have disliked our Middle East policy, but they banked -- figuratively and literally -- on our stewardship of the global financial system. Since then, doubts have crept in, and a new assertiveness to match.

The net result is rising global influence and solidifying regional power for China, India, and Brazil -- and less room for maneuver for the US.

The administration will be criticized in predictable terms from predictable quarters for acknowledging any of this, even in tacit terms: for 'giving ground' to the emerging powers, for 'ceding' American supremacy, for forgetting to carry a big stick while talking softly. But that dog won't hunt. The Bush administration had begun to adapt to these changed realities towards the end of its tenure, and the Obama administration deserves credit for putting the new global realities front and center in its assessment of U.S. national strategy. The core concepts of revitalizing international order, pressing others to take up their responsibilities and working within, not against, multilateral arrangements are the right ones.

The tougher question is, will it work? Skeptics will point to Chinese heel-dragging and Brazilian gallivanting on Iran to say no. Optimists will point to Chinese cooperation on the financial crisis, and everybody's cooperation on Somali piracy and counter-terrorism, to say yes.

The reality is, we don't know. There's a struggle in Beijing between betting on cooperation with the US, and those who seek sharper competition. A pro-U.S. strategy in India has the high ground for now, but divisions remain. The better angels in Brazil's foreign ministry can't quite hold back Lula's dalliance with global populism -- an October election there may tilt the balance.

But we know this much: if the U.S. doesn't try, no one will succeed. None of the emerging powers can underwrite stability, and none that are serious want the job. The emerging powers may not play ball, and if so, we'll be in a lose-lose global game. But only U.S. strategy can pull us into win-win, and the Administration is right to try. Making this point to the American people won't be popular; but reality is reality, and denial does not a strategy make.

Leaders or representatives from 47 countries recently attended the nuclear security summit in Washington. By holding a bilateral meeting with U.S. President Barack Obama and delivering an important speech at the summit, Hu Jintao highlighted China's positive image for people across the globe and helped reverse the deterioration of US-China relations.

Obviously, it takes a long path toward establishing a global mechanism to counter nuclear proliferation and nuclear terrorism. Many of these leaders were not quite sure whether they would come away from the summit empty-handed.

However, they decided to attend the summit mainly to respond positively to Obama, who had launched a number of initiatives to build a nuclear-free world. The same is true for Hu Jintao and his decision to attend the summit.

Hu's visit to Washington will help lead the bilateral relations toward a positive direction. Although some disputes continue between the two countries, Hu's visit to Washington will no doubt contribute to lowering U.S. hostility toward China.

Earlier, the rapid increase in GDP had stimulated some Chinese diplomats to take blind pride in dealing with their foreign counterparts. Now, it is time to rethink whether it is necessary to adhere to the well-established principle of keeping a low profile in handling Sino-American relations.

China's GDP will soon become the second largest in the world. Who is the greatest beneficiary from the pursuance of this principle over the past three decades? Needless to say, it is China.

Now, China is just halfway through its course of "peaceful rise." In the foreseeable future, the United States will remain the No. 1 power in the world. Two decades from now, who will become the greatest beneficiary if China, as the biggest developing country, is able to maintain stable relations with Washington? Obviously, the answer is China.

In his opening statement at the summit, Obama pointed out that in today's world, the world has reduced the risk of a nuclear war between big powers, but the threat of nuclear terrorist assaults is increasing. He is right. Terrorists can penetrate all places throughout the world without leaving a trace.

It is difficult for all major powers, especially the United States, to detect and prevent them from launching assaults including sudden attacks with "dirty bombs" as weapons. As such, the whole world faces the most serious security challenge.

Such a strategic assessment prompted Obama to convene the nuclear security summit as well as his earlier initiative of "a world free of nuclear weapons." Preoccupied by this assessment, he has spared no effort to promote the campaign of countering nuclear proliferation and nuclear terrorism.

To fight nuclear terrorism, the summit focused on establishing an international nuclear security mechanism. The United States and many countries face the threat of nuclear terrorism. China is no exception.

In case the East Turkistan separatists consider the timing is mature to intensify conflicts with Beijing, they will no doubt take whatever means necessary to penetrate nuclear facilities or acquire "dirty bombs." Moreover, the large-scale construction of nuclear power plants in China introduces more security challenges. China will be in the peak period of building such plants in the next two decades.

The ongoing construction of such plants scattered in coastal areas would expose the nation to threat. A terrorist attack on even one plant would result in consequences more serious than that of detonating a nuclear bomb over a city. Taking this into account, Beijing has adopted various measures to strengthen nuclear security in recent years.

As a positive response from China to the international community, Hu Jintao made the decision to attend the summit, which reflects that Beijing and Washington actually are sharing common interests by making joint efforts to establish a global mechanism for countering nuclear proliferation and nuclear terrorism.

This action indicates that Beijing regards nuclear terrorist assaults as a huge threat to national security interests and it hopes to strengthen international cooperation to limit or even eliminate this type of threat.

Also, this decision has indeed enabled China to avert a head-on collision with the United States and helped reverse a deterioration of U.S.-China relations. Based on this, we can suppose that Beijing is able to conduct strategic adjustment at a critical moment and formulate appropriate foreign policies.

The release last week of the Obama administration's Nuclear Posture Review brings long overdue attention to the vital issue of U.S. strategic posture. Issues raised in the NPR and START have reinvigorated a crucial national nuclear dialogue that has been missing.

As the chairman and vice chairman of Congress's bipartisan Strategic Posture Commission, which issued its report last May, we have watched with great interest the administration's steady progress this past year on its Nuclear Posture Review and the START negotiations.

Themes from our report run through the Nuclear Posture Review and are embodied in the new START agreement. While debate and disagreement must be part of the crossfire in this renewed nuclear dialogue, we want to emphasize important dimensions of both the Posture Review and START treaty that figure prominently in our bipartisan report.

Now that the NPR is completed, we see that it is compatible with our recommendations. The review gives a comprehensive and pragmatic plan for reducing nuclear risks to the United States. We believe it offers a bipartisan path forward - while allowing for healthy disagreements on specific issues.

And it incorporates many of our points - such as pursuing a quick and modest reduction of nuclear weapons with Russia and sustaining the nuclear triad of land-based ICBMs, sea-based SLBMs and bombers. It also recognizes that nuclear weapons safeguarded U.S. security during the Cold War by deterring attack and that we will need them for deterrence in the foreseeable future, as long as others also possess them.

We also see that the NPR puts special emphasis, as our report recommended, on improving the nation's complex nuclear infrastructure and enhancing programs to recruit and keep the nation's best scientific minds. The administration's commitment to increase investment in our national laboratories also ensures that they continue their important role in sustaining a safe, secure and effective nuclear arsenal and in solving many other problems facing the nation.

The review is correct to make preventing nuclear terrorism and proliferation the top priority, while also seeking to strengthen deterrence and to reassure U.S. allies and recognizing the importance of strategic stability with Russia and an emerging China. Our commission reached the same conclusions.

The NPR's changes in U.S. declaratory policy - especially the assurance that Washington "will not use or threaten to use nuclear weapons against non-nuclear parties to the Nonproliferation Treaty that are in compliance with their nuclear nonproliferation obligations" - go beyond our recommendation that the U.S. retain "calculated ambiguity."

It is, however, a sensible variation on a theme that the U.S. should support nonproliferation while preserving deterrence for itself and its allies.

We also note that the NPR chose, as we advised, to avoid adopting a "no first use" policy for nuclear weapons while narrowing the scope of possible first use to "extreme circumstances" - language that was in our bipartisan report.

We believe that the substantial edge the U.S. has developed in conventional military capabilities, which the NPR notes, permits this country to sharply reduce reliance on nuclear weapons. But we caution those who make light of this major U.S. strategic advantage and its implications.

We support the NPR's call for the U.S. not to develop new nuclear weapons now. Our report similarly called for a case-by-case approach to extending the life of today's warheads. And we agree that the focus should be on safety, security and reliability - not developing new military capabilities.

The NPR echoes our call to negotiate a worldwide end to the production of new fissile materials - the key ingredients of nuclear weapons.

Our final report strongly endorsed the U.S. deterrence policy to cover our allies and partners with the U.S. nuclear umbrella - an objective the NPR also embraces.

The report suggested deploying proven missile defenses against threats such as North Korea and Iran but emphasized, as the NPR does, that these defenses should not be so big as to encourage Russia to add warheads to counter them, which would only undermine efforts to reduce nuclear weapons. We included China as well as Russia in this.

But in two areas, we believe the NPR might have fallen short of the mark.

First, we understand that the review considered declassifying additional information about the size and composition of the U.S. nuclear stockpile. It should have done so. This would demonstrate U.S. leadership on the transparency that is needed to secure nuclear materials globally and to bolster strategic stability with Russia and China.

Second, the NPR called for the consideration of conventional "prompt global strike" capabilities. But it did not explain whether these systems would have a niche role against small regional powers such as North Korea or be an ultimate substitute for nuclear weapons in deterrence with Russia and China.

We feel the former is the only sensible approach. Keeping this issue ill-defined creates needless anxiety in Moscow and Beijing that could lead to future problems.

Even with these two caveats, the 2010 Nuclear Posture Review makes important strides in charting a sustainable bipartisan path forward for the United States.

Healthy disagreement over some NPR specifics should not obscure the valuable contribution it makes to advancing U.S. security interests - resting, as it does in part, on our bipartisan 2009 Strategic Posture Commission report.

William J. Perry served as secretary of defense in the Clinton administration. He was chairman of the Congressional Commission on the Strategic Posture of the United States. James R. Schlesinger was the nation's first energy secretary and served as secretary of defense from July 1973 to November 1975. He was vice chairman of the Congressional Commission on the Strategic Posture of the United States.