Al Qaeda leader Ayman al-Zawahiri, who has been killed in a US drone strike in Afghanistan, President Joe Biden said Monday, was the key ideologue behind the global terror network for several decades, though he was never able to revive the status it had under charismatic founder Osama bin Laden.
The Egyptian eye doctor, 71, had central roles in al Qaeda's signature attacks on US embassies in Kenya and Tanzania in 1998 and the massive assault on the United States itself on September 11, 2001, that left almost 3,000 dead.
