U.S. Marines carry the body of one of the 18 slain comrades on a south Vietnamese hilltop south of Khe Sahn to an evacuation point on June 17, 1968, during the Vietnam War.  The men died more than a week ago in a clash near a road being built by North Vietnamese forces from nearby Laos into extreme northwestern south Vietnam.  An American flag, found on one of the bodies, flies at half staff  (AP Photo/Henri Huet)

Photo by: HENRI HUET

U.S. Marines carry the body of one of the 18 slain comrades on a south Vietnamese hilltop south of Khe Sahn to an evacuation point on June 17, 1968, during the Vietnam War. The men died more than a week ago in a clash near a road being built by North Vietnamese forces from nearby Laos into extreme northwestern south Vietnam. An American flag, found on one of the bodies, flies at half staff (AP Photo/Henri Huet)