Only their special space clothing would provide the air pressure they needed to stay alive.

VOA: special.2009.06.24

Chaplin says it was important they took as long as they needed and made sure they were all in "the right space mentally".

BBC: Keane overcome rows and mistakes to release Strangeland

Kennedy's summons to space only needed to jolt a few thousand scientists into doing something they did not know they could do.

ECONOMIST: Lexington

The weight of the lunar module, on top of the command and service module, was the main reason why the Saturn V rockets that shot Apollo astronauts into space needed to be the tallest, heaviest and most powerful ever flown, a record they still hold.

ECONOMIST: Space lifts