The George C. Marshall Space Flight Center (MSFC) is the U.S. government's civilian rocketry and spacecraft propulsion research center. It is the largest center of NASA.
MSFC's first mission was developing the Saturn launch vehicles for the Apollo moon program. Marshall is today the agency's lead center for Space Shuttle propulsion and its external tank; payloads and related crew training; International Space Station (ISS) design and assembly; and computers, networks, and information management. Located on the Redstone Arsenal near Huntsville, Alabama, MSFC is named in honor of General of the Army George Marshall.
The center also contains the Huntsville Operations Support Center (HOSC), a facility that supports Space Shuttle launch, payload and experiment activities at the Kennedy Space Center, ISS launch and experiment operations. The HOSC also monitors rocket launches from Cape Canaveral Air Force Station when a Marshall Center payload is on board.