6th September 1940: Interwoven vapour trails over London during an early morning air raid in the Battle of Britain. (Photo by David Savill/Topical Press Agency/Getty Images)

Two Dornier 217 flying over the Silvertown area of London's Docklands. Fires have started near the Beckton Gasworks. West Ham greyhound track is near the centre of the picture, which was taken from a German bomber. (Photo by Central Press/Getty Images)

circa 1940: No 303 Squadron of Polish Spitfires in flight formation. (Photo by Hulton Archive/Getty Images)

German Nazi political and military leader Hermann Wilhelm Goering (1893 - 1946). (Photo by Alexander Binder/Getty Images)

circa 1941: A Spitfire flies past the window of a German Heinkel HE-111 bomber. (Photo by Keystone/Getty Images)

circa 1939: A dog in the gas-proof chamber invented by C.H. Gaunt, Chief Technical Superintendent of the People's Dispensary for Sick Animals. (Photo by Fox Photos/Getty Images)

circa 1940: The Spitfire production line at the Vickers Supermarine Works in Southampton. (Photo by Keystone/Getty Images)

27th October 1940: A British soldier guarding a German Messerschmitt fighter plane, which was intercepted over the English Channel and shot down by a Spitfire patrol. (Photo by Parker/Fox Photos/Getty Images)

17th January 1941: A British spitfire fighter plane, flying at 400 miles per hour, moving in on its target, a German 'flying pencil' bomber. (Photo by Keystone/Getty Images)

Fighter pilots of No. 601 Squadron RAF (County of London) Squadron running to their Hawker Hurricane aircraft during the Blitz, 9th January 1941. (Photo by William Vanderson/Fox Photos/Hulton Archive/Getty Images)