The Apollo mission for each of these astronauts, (or astroNOTS as Ralph René calls them), was their FIRST, and ONLY, experience of space travel, apart from Shepard's 15 minute sub orbital space hop, which was limited experience of zero gravity. Anders, Bean, Haise, Swigert, Mitchell, Shepard, Irwin, Duke, Schmitt, Roosa, Worden, Mattingly and Evans. The last three of this list allegedly performed deep space walks, (250,000 miles from Earth), on the return mission.