NASA's first tragedy is recalled annually at Launch Complex 34. This year is different, as the Artemis II mission sits on the horizon.

They were the pioneers of space exploration - the 24 Nasa astronauts who travelled to the Moon in the Apollo missions of the 1960s and 1970s. The loss of Apollo 13 commander Jim Lovell, who guided the stricken mission safely back to Earth in 1970, means ...