STS-33

STS-33 was Discovery's November 1989 Space Shuttle mission for the U.S. Department of Defense. NASA identifies Frederick Gregory as commander, John Blaha as pilot, and Manley "Sonny" Carter, Story Musgrave, and Kathryn Thornton as mission specialists. Discovery launched at night from Kennedy Space Center's Launch Complex 39B on November 22, 1989, and landed on Runway 04 at Edwards Air Force Base on November 27. Because the primary payload was classified, public mission descriptions remain limited. NASA's astronaut biography for Gregory describes the flight as carrying Department of Defense payloads and other secondary payloads, completing 79 Earth orbits, and ending with a hard-surface landing at Edwards. Other public references identify the flight as one of the Shuttle program's dedicated defense missions, so this production record keeps the payload wording conservative rather than naming uncertain classified hardware as fact. Adding this mission fills John Blaha's missing STS-33 link, creates the absent commander record for Frederick Gregory, and connects the full five-person crew to Discovery, the Space Shuttle family, Launch Complex 39B, Edwards Air Force Base, and NASA as operator.