The U. S. Manned Space Program began in 1958 in response to the former Soviet Union's launch of Sputnik. President Kennedy challenged the U. S. to put a man on the moon before the end of the 1960's. This goal was realized in 1969 when astronaut Neil Armstrong walked on the moon. The space programs, in order, were Mercury, Gemini, Apollo, Skylab, and the Space Shuttle. You will find links below to overviews of each of these programs, except for Skylab. (Skylab is omitted because none of its technical drawings were utilized in SpaceCAD.)