Suspected U.S. drone strikes kill son of American-born cleric Anwar al-Awlaki and six Al Qaeda militants in what appears to be part of a determined effort to stamp out the terror group's Yemeni branch.Security Forces Fire on Protesters in Yemen, Killing 8Son of N.Y. Bomb Plot Sheik KilledU.S. Missiles Kill 6 in PakistanMilitants Assault U.S.