This week in 1965, NASA’s Marshall Space Flight Center completed structural assembly of the Saturn V vibration test article, S-IU-500V. Designed by Marshall and built by IBM, the instrument unit served as the nerve center for the Saturn V, providing guidance and control, command and sequence of vehicle functions, telemetry and environmental control. Here, a technician checks the systems of S-IU-501, employed on the Apollo 4’s rocket, in a test facility. Now through December 2022, NASA will mark the 50th anniversary of the Apollo Program that landed a dozen astronauts on the Moon between July 1969 and December 1972, and the first U.S. crewed mission — Apollo 8 — that circumnavigated the Moon in December 1968. The NASA History Program is responsible for generating, disseminating and preserving NASA’s remarkable history and providing a comprehensive understanding of the institutional, cultural, social, political, economic, technological and scientific aspects of NASA’s activities in aeronautics and space. For more pictures like this one and to connect to NASA’s history, visit the Marshall History Program’s webpage. (NASA)