May 16, 1943, was a night that changed WWII. Nineteen Lancaster bombers filled with 133 hand-picked and specially trained airmen took off on a night mission code-named Operation Chastise; their targets - the Ruhr River dams - whose massive water reservoirs powered Nazi Germany's military industrial complex. This mission cost the lives of fifty-three airmen, including fourteen Canadians. Based on personal accounts, flight logs, maps and photographs of the Canadians involved, 'Dam Busters' recounts the dramatic story of these young Commonwealth bomber crews.