Exploring the Unknown: Human spaceflight

abort accomplished activities Aeronautics and Space Agena Air Force aircraft Apollo program ARPA astronauts Atlas attitude ballistic booster capability circumlunar control system crew debriefing Director Document Title earth orbit engineers equipment experience extra-vehicular activity Folder Gemini IV Gemini Program Gilruth Glennan hatch heat Historical Reference Collection human spaceflight included initial Langley launch vehicle lunar landing man-in-space maneuver maximum McDivitt McDonnell Memorandum Mercury capsule Mercury program Mercury Seven Mercury spacecraft Mercury-Redstone Missile mission Moon NACA NASA Headquarters NASA Historical Reference NASA History Division NASA's National Aeronautics operation orbital flight panel parachute performance phase pilot planned pounds President pressure problem Project Gemini Project Mercury proposed recovery Redstone reentry reliability rendezvous retrorocket Robert Gilruth rocket satellite Saturn schedule scientific selection simulation Soviet space flight space program Space Task Group Spacecraft Center Washington Webb weightlessness Wernher von Braun