Nineteen years after 9/11, al Qaeda chief Ayman al-Zawahiri has yet to achieve the household notoriety evoked by that of his immediate predecessor, Osama bin Laden. Yet, Al Qaeda maintains affiliates in regions across Africa, the Middle East, and South Asia. And though he’s conjured less of a personality cult, al Qaeda’s current leader is just as dangerous to the United States as its old one.

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