During the Cold War, the CIA planned a mission where one of its agents would impersonate GRU Major Ivan Raidenovitch Raikov, infiltrate a Soviet base, and steal documents, but it was cancelled. During the Virtuous Mission, the Soviet rocket scientist Dr. Nikolai Sokolov proceeded to place various classified documents relating to the Shagohod's development into a lit stove, eventually disposing of all of them in a hurry after Naked Snake arrived, under the belief the latter was one of the GRU Colonel Volgin's soldiers. In addition, during Operation Snake Eater, documents detailing Metal Gear, as well as designs of the Shagohod with Aleksandr Leonovitch Granin's commentary were submitted to the CIA by Philosophers agent Ocelot shortly before Granin's arrest.