Buzz Aldrin propellants, with an expected five and a half month journey from the Earth to Mars, and a return trip to Earth of about the same duration on a twin-cycler. Aldrin continues to research this concept with engineers from Purdue University. In December 2003, Aldrin published an opinion piece in "The New York Times" criticizing NASA's objectives. In it, he voiced concern about NASA's development of a spacecraft "limited to transporting four astronauts at a time with little or no cargo carrying capability" and declared the goal of sending astronauts back to the Moon was "more like reaching for past glory
Buzz Aldrin return to the Air Force. During his NASA career, he had spent 289 hours and 53 minutes in space, of which 7 hours and 52 minutes spent was in EVA. He hoped to become Commandant of Cadets at the United States Air Force Academy, but this job was given to his West Point classmate Hoyt S. Vandenberg Jr. Aldrin was assigned as Commandant of the USAF Aerospace Research Pilot School at Edwards Air Force Base, California, on July 1, 1971. Aldrin had neither managerial nor test pilot experience, but a third of the training curriculum was devoted to astronaut training,