U.S. escalates clandestine war in Yemen U.S. escalates clandestine war in Yemen "U.S. escalates clandestine war in Yemen" U.S. escalates clandestine war in Yemen ran on May 16 U.S. escalates clandestine war in Yemen several dozen U.S. military personnel were on the ground several dozen U.S. military personnel were on the ground U.S. escalates clandestine war in Yemen The Los Angeles Times U.S. escalates clandestine war in Yemen article ran on May 16 ran on May 16 U.S. escalates clandestine war in Yemen ran on May 16 "U.S. escalates clandestine war in Yemen"