From the BBC news website - http://www.bbc.co.uk/programmes/p02rcd2x Revolutionary dome that changed the war Britain's lack of anti-aircraft training during the Second World War was a cause for major concern. But Henry Christian Stephens solved the problem by inventing a simulator training machine. Working with Kodak, he invented the 'Dome Trainer', a machine which projected film onto a spherical surface to simulate the noise of action of being dived-bombed during an enemy attack. There was a huge demand for this technology with 43 domes being built across the UK including one at Langham which survives today. This puzzling dome structure was a forerunner of today's immersive experiences including Imax screens, aircraft pilot simulation and computer games. Stephen Fry discovers how this revolutionary invention saved thousands of lives and shortened the Second World War.