London Can Take It!

Wikipedia:
London Can Take It! is a short British propaganda film from 1940, which shows the effects of eighteen hours of the German blitz on London and its people. Intended to sway the US population in favour of Britain's plight, it was produced by the GPO Film Unit for the British Ministry of Information and distributed throughout the United States by Warner Bros. The film was directed by Humphrey Jennings and Harry Watt, and narrated by US war correspondent Quentin Reynolds.