Astronaut Edwin Aldrin practices tether attachment aboard KC-135

S66-57326 (13 Oct. 1966) --- Astronaut Edwin E. Aldrin Jr., pilot for the Gemini-12 spaceflight, attaches tether to hooks on mock-up of the adapter section of a Gemini spacecraft. He is taking part in zero-gravity training onboard an Air Force KC-135 jet aircraft in preparation for his extravehicular activity (EVA) during the actual mission. Photo credit: NASA