Al Qaeda’s No. 2 leader in Yemen was killed in an airstrike Monday, along with five others who were riding with him in a car. Yemeni Defense Ministry officials say that Saeed al-Shihri was killed after leaving a house in the Hadramawt province. The officials believe that a U.S.-operated drone fired the missile, but U.S. officials do not usually comment on drone attacks. The United States has used drones to kill al Qaeda members in Yemen before.