CIA documents suggest presence of giant aliens on Mars [details inside] As the CIA document has gone viral, several people strongly believe that the United States government is covering up secrets surrounding alien existence Was Pentagon researching on alien and UFO-related incidents? A declassified CIA document from 1984 is now going viral on online spaces, and it suggests that the United States may have observed alien life on the Martian surface. The document has been released by The Black Vault and it has gone viral at a time when NASA created history by landing its Perseverance Rover on the surface of the Red Planet, aiming to uncover secrets of ancient life on Mars.