Experimental Raft Which Had To Burned -- The 20-man experimental life raft, dubbed "the covered wagon," proceeds towards Ludington, Mich., at the head of flotilla of 11 rafts like the one at left off Sheboygan toward Ludington, across Lake Michigan. The army said the crossing was a success but that the "covered wagon" (right) had to be burned 20 miles off Ludington as a "navigational hazard". July 21, 1947. (Photo by AP Wirephoto).