Story of the Lost Nuke

It's one of the worst case scenarios in the nuclear age, and it occurred on February 13, 1950. Flying over restricted airspace across the Canadian border, a United States Air Force bomber experienced massive engine failure, and the crew were forced to abandon their craft in mid-air. The plane went down in the remote mountain ranges of British Columbia. Several crew members went down with it, as well as its perilous cargo: a Mark IV nuclear bomb.