Several conspiracy theorists including a U.S. Army officer who served for NATO have openly blamed NASA for covering up the UFOs encountered by astronauts from the Apollo 11 Moon mission. According to them, the space agency allegedly destroyed evidence of the encounter by deleting tapes from the event.

Bob Dean, a former U.S. Army Command Sergeant Major, noted that NASA erased up to 40 rolls of film from the mission. He said this was the agency way of ensuring that the public will never learn about what truly happened during the first human mission to the Moon.

“My government, NASA, which many of us in the United States say stands for Never A Straight Answer, proceeded to erase 40 rolls of film of the Apollo Program – the flight to the Moon, and flight around the Moon, the landings on the Moon, the walking guys here and there,” Dean said, according to Express.

Dean’s accusations against NASA were strengthened by the revelation of Steven Greer, the founder of the Center for the Study of Extraterrestrial Intelligence. In a video posted on YouTube, Greer said that the friends and relatives of Neil Armstrong and Buzz Aldrin told him that the astronauts saw UFOs on the Moon during their mission.

Greer added that military officials confirmed that there are footages of the astronauts’ UFO sightings. The videos, however, were not released to the public.

Earlier this week, NASA released an official statement addressing the accusations made by conspiracy theorists and UFO enthusiasts. In the statement, the agency admitted some of the tapes from the Apollo 11 mission are currently missing. NASA noted that some of these tapes may have already been erased.

“NASA searched for but could not locate some of the original Apollo 11 data tapes – ‘original’ in the sense that they directly recorded data transmitted from the Moon,” the agency stated.

“An intensive search of archives and records concluded that the most likely scenario was that the program managers determined there was no longer a need to keep the tapes – since all the video and data were recorded elsewhere – and they were erased and reused,” NASA added.

Although the space agency confirmed the status of the missing tapes, it did not go into detail regarding their content. NASA also didn’t address the theories regarding the presence of UFOs on the Moon.