‘We’re all citizens of planet Earth’: former astronaut Bill Nelson on his mission at Nasa

Nasa's new administrator discusses the space race with China, UFOs, billionaire astronauts' and building a mission control' for climate change

When Apollo 11 launched in July 1969, Bill Nelson was an army lieutenant on leave behind the iron curtain, listening with colleagues to the BBC on shortwave radio.

There were three young Americans standing on the hills overlooking Budapest, screaming at the top of our lungs, cheering as that rocket lifted off," Nasa's new administrator recalled in a video interview.