I watched this film several years ago, and this remains my firm best ever in its class. The footage of the magnificent Lancaster Bombers in flight, probably one of the last times these aircraft ever flew in numbers post the war. The magnitude of dropping bouncing bombs, outrageous in concept, magnificent and daring in its reality.The high casulty rate, incredible sacrifice of the brilliant pilots flying at 60 metres from the surface, the way of life of the scientists and pilot, and the clastrophobic red tape these people have to overcome, a battle against bureaucracy before the barrage of guns, gives one a true sense of what this must have been like.It is said that George Lucas used people involved with the dam busters to set up and assist with the attack on the death star sequence. Certainly, this would make a lot of sense. The tunnel sequences give the same sense of flying close up that I personally experienced flying hand gliders some years ago.Sure the dam busting itself has a sense of studio make in it, but this still remains a suberb film.