The actual flight back-up unit of the Astronaut Maneuvering Unit (AMU) that was to be worn by space walking astronaut Gene Cernan during the Gemini 9 mission in 1966. The Commander of the mission, Tom Stafford, had to cut Cernan’s EVA short because of major problems encountered by Cernan that nearly cost him his life. The original AMU was not returned to Earth. (Actual Artifact)