This is the story of a living legend and his part in one of the greatest exploits in British military history: Operation Chastise was the code name given to one of the most audacious air raids of World War II - on the night of 16/17 May 1943, nineteen Lancasters with 133 men of the specially formed 617 Squadron took off from RAF Scampton to attack the Mohne, Sorpe, Ennepe and Eder dams at the heart of the Ruhr. Squadron Leader Johnny Johnson DFM is one of the Last of the Dambusters and hero of the most daring air raid of World War Two.