400,000 people worked behind the scenes to make the Apollo 11 moon landing happen. In this CBS News video, Steve Bales, the guidance officer for the historic flight, talks about giving the green light when they received 1202 program alarms. He explains that a 1202 alarm meant the computer wasn't finishing all its tasks that it was assigned to do that second. President Nixon gave out the Presidential Medal of Freedom to Bales as a representative of everyone at mission control.
Mary Weilage is a Senior Editor for CBS Interactive. She has worked for TechRepublic since 1999.