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 that was a dead end, as it would be Gemini 13 which did not exist; the last scheduled mission in the program was Gemini 12. But the February 28, 1966, deaths of the Gemini 9 prime crew, Elliot See and Charles Bassett, in an air crash, led to Lovell and Aldrin being moved up one mission on March 21 to backup for Gemini 9, which put them in position as prime crew for Gemini 12. They were officially designated its prime crew on June 17, 1966, with Gordon Cooper and Gene Cernan as their backups. Initially, Gemini 12's mission objectives