None of the Apollo 15 crew flew in space again. Given that the reprimands meant they would never be promoted by the Air Force, they were offered other positions at NASA where their skills could be used. Scott was made a technical adviser on the Apollo-Soyuz Test Project (the first joint mission with the Soviet Union) and retired from the Air Force in 1975. He became director of NASA's Dryden Flight Research Center, retiring from NASA in October 1977 and entering the private sector. Worden transferred to NASA's Ames Research Center in California, remaining there until his 1975 retirement both from the Air Force and NASA, and then entered the private sector. Irwin retired in 1972 and founded an evangelical group.