Johnny Johnson is 92 years old and one of very few men who can recall first-hand the most daring and ingenious air raid of all time. He can also vividly remember his childhood spent working on a farm with his controlling father the series of events that led him to the RAF and the rigorous training that followed. But it was his decision to join 617 Squadron and the consequences that have truly stayed etched in his mind. On 16 May 1943 Johnny alongside 132 specially selected comrades took off from Scampton airbase in Lincolnshire. For six weeks they had been trained to fulfil one mission that was near impossible: to destroy three dams deep within Germany's Ruhr Valley.