“The Apollo program was set up as an end game to get men on the Moon and return them safely. But to get there you have to learn to walk before you can run,” recalls Sam Koeppel, technical editor, Lunar Module, Grumman. What were the preliminary things and projects involved in doing that? Thousands of engineers worked on the Apollo program. In this video, go behind the scenes with some of them as they recount the making of the lunar module.