British air raid wardens on the roof of a government building in central London scan the sky for any sign of incoming Luftwaffe bombers during the Blitz in February 1941. (Popperfoto/Getty Images)
British Air Wardens
British air raid wardens on the roof of a government building in central London scan the sky for any sign of incoming Luftwaffe bombers during the Blitz in February 1941. (Popperfoto/Getty Images)