Al Qaeda leader Zawahiri killed in U.S. strike:

STORY: The leader of al Qaeda was killed by a U.S. drone strike in Afghanistan's capital over the weekend, according to President Joe Biden on Monday, in the biggest blow to the militant group since founder Osama bin Laden was killed eleven years ago.

"My fellow Americans, on Saturday at my direction, the United States successfully concluded an air strike in Kabul, Afghanistan, that killed the emir of al Qaeda, Ayman al-Zawahiri."

"None of his family members were hurt and there were no civilian casualties. I'm sharing this news with the American people now, after confirming the mission's total success through the painstaking work of our counterterrorism community and key allies and partners."

Zawahiri, an Egyptian surgeon who had a $25 million bounty on his head, succeeded bin Laden as al Qaeda leader, after years as its main organizer and strategist.

Zawahiri helped coordinate the 9/11 attacks that killed nearly 3,000 people in New York City.

Biden also said he masterminded or played a key role in attacks on the USS Cole in the year 2000 that left 17 sailors dead, as well as on two African U.S. embassies two years prior which left hundreds dead and thousands more wounded.

"No matter how long it takes, no matter where you hide, if you are a threat to our people, the United States will find you and take you out."