Early in 1943, 617 Squadron was formed for just one special job--to smash th Moehne and Eder Dams. That epic affaird made the R.A.F.'s newest squadron also its finest, the "special duties squadron." Here are all their great feats, with the laughter, the drama and the genius behind them, told in unusually intimate detail by the ex-Air Force pilot who wrote the best seller, The Great Escape.