The Apollo moon missions were highly publicised events, but some believe NASA has been keeping secrets about them.
A Russian official has cast doubt on the first moon landings and demanded an investigation in to what really happened after original NASA footage of the event disappeared.
Vladimir Markin, a spokesman for the Russian government's Investigative Committee, says he wants an inquiry after the video from the 1969 landing and a piece of lunar rock, which was brought back to earth, went missing.
In an opinion piece in the Russian newspaper Izvestia, Mr Markin says that an inquiry is vital to reveal new insights into the historic space journey. He called for an international inquiry into missing documentation and artifacts from the Apollo landings.
Markin clarifies, however, that he's not challenging whether or not the moon landing actually happened.
Missing lunar rocks
The items in question include the original footage of the first lunar landing and rocks retrieved from the moon's surface.
NASA has already admitted six years ago they erased the original recording of the historic moment while reusing tapes to store data from satellites. The agency has since cobbled together a replacement using clips gathered from news agencies.
As for the rocks, they're said to be safe and sound at the Johnson Space Center in Houston, Texas.