After Apollo 17, America stopped looking towards the next horizon. The United States had become a space-faring nation, but threw it away. We have sacrificed space exploration for space exploitation, which is interesting but scarcely visionary. —Eugene Cernan
July 19, 1963 – Joe Walker flies a North American X-15 to a record altitude of 106,010 meters (347,800 feet) on X-15 Flight 90. Exceeding an altitude
June 3, 1965 — Astronaut Edward White became the first American to “walk” in space, during the flight of Gemini 4.