In this unique footage from the IWM collection, filmed shortly before the Dambusters' Raid in May 1943, an Avro Lancaster flies low off the Kent coast trialling a cylinder-type "Upkeep" bouncing bomb. Learn more about the incredible story behind the raid: http://bit.ly/2rPxxAK © IWM MTE 3437 | Imperial War Museum Duxford

THE DAM BUSTERS is newly restored in 4K to commemorate the 75th anniversary of the famous WWII raid. Don't miss a special Royal Albert Hall gala screening of the much loved British classic, presented by Dan Snow and broadcast to cinemas across the country for one day only on May 17th. Book your tickets now: www.thedambusters75.co.uk | STUDIOCANAL

With millions heading to theatres to see Dunkirk, there is a renewed curiosity about one of the most heroic missions of all time. Our new documentary tells all. Watch 'Dunkirk: Resist At All Costs' at http://bit.ly/2vY6qUR | Curiosity Stream