The conspiracy would have to involve the more than 400,000 people who worked on the Apollo project for nearly ten years , the 12 men who walked on the Moon , the six others who flew with them as Command Module pilots , and another six astronauts who orbited the Moon .
More than 400,000 people worked on the Apollo project for almost ten years , and 12 men who walked on the Moon returned to Earth to talk about their experiences .