In 1957, a group of Military Policemen kept guard at the front gate of Hangar 51 which had been evacuated due to an impending nuclear test. When a convoy of Soviet Special Forces disguised as American soldiers appeared at the gate, the sergeant leading the M.P. group told them that the hangar was closed. Antonin Dovchenko appeared under the guise of an American Colonel "Truman", but the sergeant told him that this order would also go for him. Dovchenko stooped down and the soldiers behind him gunned down the policemen and dragged their bodies away from the guard house.