Al-Qaida militants in Yemen killed two men accused of spying for the U.S. and hung their bodies off a bridge on Wednesday, a day after the militant group announced the death of its leader in an American drone strike. Witnesses said al-Qaida gunmen in the southern city of Mukalla read out charges before shooting the two men, one of whom was accused of guiding the drone that killed commander Nasr al-Ansi and a media liaison known as Muhannad Ghalab in April.