Al-Qaeda has confirmed the death of its second most powerful leader in a U.S. drone strike in Yemen. Nasser al-Wuhayshi was the leader of al-Qaeda in the Arabian Peninsula, the group’s Yemeni affiliate, and a former personal secretary of Osama bin Laden. The confirmation of his death comes as uncertainty remains over a U.S. attempt to kill militant leader Mokhtar Belmokhtar in Libya. Al-Qaeda released a list of people they say were killed in the U.S. airstrike over the weekend, but Belmokhtar is not on it.