Astronaut Jim Lovell, who guided the Apollo 13 mission safely back to Earth in 1970, has died aged 97. Nasa said he had "turned a potential tragedy into a success" after an attempt to land on the Moon was aborted because of an explosion onboard the spacecraft while it was hundreds of thousands of miles from Earth.

Of the 24 Nasa astronauts who travelled to the Moon in the Apollo missions of the 1960s and 1970s, just six remain.