The night of 16 May, 1943. Nineteen specially adapted Lancaster bombers take off from RAF Scampton in Lincolnshire, each with a huge 9000lb cylindrical bomb strapped underneath it. Their mission: to destroy three dams deep within the German heartland, which provide the lifeblood to the industries supplying the Third Reich's war machine. From the outset it was an almost impossible task, a suicide mission: to fly low and at night in formation over...