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No. 617 Squadron is a Royal Air Force aircraft squadron based at RAF Lossiemouth in Scotland. It currently operates the Tornado GR4 in the ground attack and reconnaissance role. It is commonly known as the "Dambusters", for its actions during Operation Chastise against German dams during the Second World War.
Operation Chastise was an attack on German dams carried out on 16–17 May 1943 by Royal Air Force No. 617 Squadron, subsequently publicised as the "Dam Busters", using a specially developed "bouncing bomb" invented and developed by Barnes Wallis. The Möhne and Edersee Dams were breached, causing catastrophic flooding of the Ruhr valley and of villages in the Eder valley, while the Sorpe dam sustained only minor damage. Two hydroelectric powerplants were destroyed and several more were damaged. Factories and mines were also either damaged or destroyed. An estimated 1,600 people drowned. The damage was mitigated by rapid repairs by the Germans, with production returning to normal in September