All three Apollo 11 crew members were encouraged to take the bulky cameras on family vacations to familiarize themselves with their unusual operation, according to a NASA website.
Armstrong, the first human to set foot on the lunar surface, and Aldrin had one camera for their moonwalk and they had planned to share it. However, Armstrong had the camera for almost the entire two-and-a-half hour landing. As a result nearly all the still photographs showing an astronaut on the moon are of Aldrin, the website says.
NASA noticed this embarrassing omission as the agency struggled to find a photo of the first man to walk on the moon actually walking on the moon.