During times of crisis in the UK, World War Two is often remembered as a period when the country rallied together to fight a common enemy. But as Simon Watts finds out from the BBC archives, there was a crime wave during the war years, with a massive increase in looting and black marketeering. Also in the programme, the first 3D printers, plus a black policeman recalls the 1980 Miami riots, Hong Kong's city within a city and explaining autism.

PHOTO: A government poster from World War Two (Getty Images)