After Osama bin Laden, Ayman al-Zawahiri was the public face of al-Qaeda terrorism in the decade and more after the attacks on New York and Washington on September 11, 2001. Turbaned, shaggy-bearded and bespectacled, Zawahiri became chillingly familiar to world audiences in the grainy videos released at regular intervals by al-Qaeda in the years after that outrage. He was known by American intelligence as the “Egyptian warm-up” man…