Earlier this month, the so-called EU Three--Britain, France and Germany-- achieved an important victory for global security, convincing Iran to suspend its uranium enrichment and plutonium reprocessing activities pending further negotiation on its nuclear question. Though Iran claims that it does not desire a nuclear bomb, the West has long been skeptical of the oil-rich state's contention that it seeks a nuclear fuel cycle for energy purposes alone. Europe and the United States (and of course Israel) will sleep better knowing that Tehran is not pursuing enrichment activities, whatever their alleged purpose.

But the EU3 agreement, which fails to discuss consequences for Iran if it breaks the deal, is vulnerable to being undermined not only by Iran but also by the United States; both have already raised eyebrows in the wake of the accord. Iran raced to produce uranium hexafluoride, a gas that can be enriched into bomb fuel, before it began to observe the temporary suspension on Monday. And both President George W. Bush and outgoing Secretary of State Colin Powell have publicly aired their suspicions that Iran will continue its drive for nuclear weapons under cover of the deal.

At the moment, administration hawks are pressing to confront the mullahs at the United Nations Security Council, where economic sanctions could be considered; calls for using force and for regime change are likely to follow.

Military action is inadvisable at this point, because of a dearth of solid intelligence and the secretive, geographically diffuse nature of Iran's nuclear sites. If the issue reaches the Security Council with the United States and Europe continuing along divergent paths, the inevitable deadlock will deal a severe and lasting blow to international security. Therefore, the agreement must be fortified to keep the Iranians honest, the Europeans effectively engaged and the U.S. hawks bridled.

This can be achieved through a U.S.-European accord laying out trigger mechanisms for specified consequences if Iran violates certain benchmarks. For example, if Iran fails to allow inspectors the access accorded by the Nuclear Nonproliferation Treaty's additional protocol--which Iran is provisionally observing pending ratification--or resumes enrichment and centrifuge-building activities, it could face severe economic sanctions, censure by the Security Council (necessitating cooperation from Russia and China), or in the event of hostility, a forceful response.

We don't know yet whether Tehran will play by the rules. The regime has mastered the art of behaving badly and then seeking rewards for getting back into line. To date, the Europeans have played into its hands, offering carrots for compliance without wielding sticks to punish violations.

Therefore, the Bush administration's apparent comfort with a military option can serve as an important deterrent against Iranian cheating, arming the EU3 agreement with teeth that it would not otherwise have. Iran desires economic incentives but does not yet desperately need them; without a credible threat of U.S.-backed sanctions imposed by the international community, the mullahs can simply decide one day that the restrictions have ceased to be worth their while, and break any deal as though it were merely a business contract.

For the United States, accepting the EU3's carrot-based approach (provided the benchmarks are added) will show the world that it still supports negotiated diplomacy and multilateralism, even in cases where military threats loom. Participating in this framework will also send a message to Iran that the United States is not ruling out renewed relations. This would resonate with the largely pro-American Iranian populace, who despise their regime and are seeking inroads to break free of it.

But if the United States instead presents itself as a unilateralist maverick, it will hinder its own interests; the only thing Iranians disdain more than the mullahs is outside meddling with their deeply nationalistic desire for self-determination. The more overtly hostile the United States acts toward Iran, the more the mullahs are able to spin America's posture to alienate Iranians against the "Great Satan."

The way to keep the Iranian regime in check while speeding its demise is to insure the nuclear agreement through benchmarks and triggers, and then give the mullahs exactly what they ask for in terms of increased access to international institutions like the World Trade Organization.

Such carrots can also be Trojan Horses, allowing the forces of democratic reform within Iran to blossom by enabling pro-democracy elements to make global connections. The U.S. and Europe should saddle up those horses together.

Nuclear weapons states must move to disarm, and nations must join in multilateral approaches to prevent further nuclear proliferation, said Mohamed ElBaradei, head of the International Atomic Energy Agency (IAEA), at CISAC's Drell Lecture on Nov. 4.

"If we are ever to build a global security culture based on human solidarity and shared human values -- a collective security framework that will serve the interests of all countries equally, and make reliance on nuclear weapons obsolete -- the time is now," ElBaradei said. Drawing lessons from Iraq and other recent experiences with IAEA nuclear weapons inspections, ElBaradei called upon politicians, scientists and society to join in international collective actions toward nuclear disarmament.

ElBaradei's lecture was covered by Reuters, the Stanford Daily: U.N. expert cites nuclear danger, the San Jose Mercury News and other news media.

Mohamed ElBaradei, director-general of the International Atomic Energy Agency (IAEA), will deliver the annual Drell Lecture, presented by the Center for International Security and Cooperation (CISAC), 4 p.m. Thurs., Nov. 4, 2004, in Stanford University's Kresge Auditorium. His lecture, "Nuclear Non-Proliferation and Arms Control: The Road Ahead," is free and open to the public.

As head of the IAEA, ElBaradei oversees international inspections enforcing provisions of the Nuclear Non-Proliferation Treaty (NPT) and related arms control agreements. Prior to the U.S.-led invasion of Iraq in spring 2003, ElBaradei and Hans Blix, former chief of U.N. Monitoring, Verification and Inspection Commission (UNMOVIC), the IAEA group charged with carrying out U.N. Security Council-mandated inspections in Iraq, reported progress with the inspections. As IAEA inspectors evacuated from Iraq on March 19, 2003, ElBaradei continued to urge completion of the U.N. Security Council inspection process.

More recently, IAEA reprimands of Iran have made headlines, with the agency's board of governors scheduled to revisit Iran's compliance with NPT provisions shortly after ElBaradei's visit to Stanford. On Sept. 13, 2004, the IAEA issued a deadline of Nov. 25 for Iran to report fully on its nuclear program. For more than a year, the U.S. has advocated referral of Iran's case to the U.N. Security Council, after inspections revealed evidence of covert Iranian nuclear research.

Before assuming the IAEA's top job on Dec. 1, 1997, ElBaradei held a number of high-level policy positions, including that of IAEA legal adviser. A diplomat and scholar, ElBaradei works closely with international organizations, particularly in the fields of peace, security and law.

CISAC's Drell Lecture traditionally addresses a critical national or international security issue that has important scientific or technical dimensions. The lecture is named for Sidney Drell, CISAC's founding science co-director. Albert and Cicely Wheelon generously endowed the lectureship.

In an address at the recent CISAC-sponsored Conference on South Asia and the Nuclear Future, held June 4-5 at Stanford, New York Times reporter David Sanger discussed the nuclear trading network of Abdul Qadeer Khan, which exported nuclear weapons and weapons components to some of the world's aspiring nuclear powers. Sanger's talk, "U.S. Responses to the A.Q. Khan Network," was based on a series of articles previously published in the Times, which resulted from his in-depth research and reporting in collaboration with other Times reporters.

In his talk, Sanger discussed how the Khan network began and how it worked; how it has made clear the limitations of the nuclear Nonproliferation Treaty; how it has raised serious questions about the quality of intelligence about nuclear proliferation; and how it has forced a fundamental rethinking of the nuclear danger posed to the world.