U.S. drone strike kills top al Qaeda leader Ayman al-Zawahiri

President Biden announced Monday that the U.S. had killed with a drone strike one of the masterminds behind the 9/11 attacks. CBS News senior investigative correspondent Catherine Herridge reports and Mark Jacobson, the assistant dean for Washington programs at Syracuse University's Maxwell School and former deputy NATO Afghanistan adviser, joins "CBS News Mornings" with analysis.