Enterprise is the only initial run of test full-up shuttles to survive the NASA STS program, the other two, OV-102 Columbia, and OV-099 Challenger, were both destroyed. Otherwise, only flight-unworthy articles of the build and test era survive, OV-098 Pathfinder and the mockup OV-100 Explorer. Enterprise currently resides at the Intrepid Air & Space Museum in New York City.