Al Crews (Col., ret.) attended the USAF astronaut school, the Aerospace Research Pilots School. Twice he was in the final selections for astronaut training with NASA, but was diverted to the Dyna-Soar & Manned Orbiting Laboratory (MOL) USAF programs. This was taken in 2009.
Dyna-Soar Group 2, Manned Orbiting Laboratory Group 1