STS-33 was a NASA Space Shuttle mission, during which Space Shuttle Discovery deployed a payload for the United States Department of Defense (DoD). STS-33 was the 32nd shuttle mission overall, the ninth flight of Discovery, and the fifth shuttle mission in support of the DoD. Due to the nature of the mission, specific details remain classified. Discovery lifted off from Pad A, Launch Complex 39 at Kennedy Space Center (KSC), Florida, on 22 November 1989 at 7:23 pm EST; it landed at Edwards Air Force Base, California, on 28 November.