The United States killed al-Qaeda leader Ayman al-Zawahiri in a "precision" strike in the center of Kabul, the Afghanistan capital, President Joe Biden said, the biggest blow to the militant group since its founder Osama bin Laden was killed in 2011.
Zawahiri, an Egyptian surgeon who had a $25 million bounty on his head, helped coordinate the Sept. 11, 2001, attacks that killed nearly 3,000 people.
