Ronald Evans (astronaut) 19 astronauts selected by NASA in April 1966. He served as a member of the astronaut support crews for the Apollo 7 and Apollo 11 flights, and as backup Command Module Pilot for Apollo 14. Evans' only space flight was as Command Module Pilot of Apollo 17, the last scheduled U.S. manned mission to the Moon. He was accompanied by Eugene Cernan and Harrison Schmitt. While Cernan and Schmitt landed and worked on the Moon in the Taurus–Littrow valley, Evans remained in lunar orbit on board the Command Module "America", completing assigned work tasks which required visual geological observations, hand-held
Michael Collins (astronaut) astronaut who had already flown a mission, and that on flights with a LM, the CMP should also have some spaceflight experience, something Anders did not yet have. Collins was therefore moved to the CMP position on the Apollo 8 prime crew, and Anders became the LMP. The policy became that the CMP would be the next most senior member of the crew, and that they would go on to command later Apollo flights. Staff meetings were always held on Fridays in the Astronaut Office and it was here that Collins found himself on January 27, 1967. Don Gregory was