LOUISVILLE, Ky. (AP) — A Humvee carrying six Navy SEALs and two other sailors overturned during a training exercise at Fort Knox in Kentucky, killing one of the SEALs and injuring the others, military officials said Friday. Lt. David Lloyd, a spokesman for the Naval Special Warfare Group Two in Virginia Beach, Va., said the Humvee was part of a convoy on the post when it overturned Wednesday night. What caused it to flip remains under investigation, he said.