Documentary about the development of the Boeing 747 jumbo jet. The 747 was a game changer, the airliner that revolutionised mass, cheap air travel. But the first wide-bodied plane was originally intended as a stopgap to Boeing's now-abandoned supersonic jet. This is the remarkable untold story of the jumbo, a billion-dollar gamble that pushed 1960s technology to the limits to create one of the world's most recognisable planes.

• Documentary