Preserving America's history of Space Exploration.
The US Space Force Historical Foundation, Inc. is a non-profit 501(c)(3).
Representing the engineering-intensive mission plan, for the third orbital flight of Mercury astronaut Wally Schirra named his capsule Sigma 7. Mercury's systems were thoroughly tested in space during six orbits on Oct. 3, 1962. The spacecraft splashed down in the Pacific Ocean, a first for NASA.