OV-101 was planned to be named Constitution, but an organized letter writing campaign lead NASA to name the vehicle after the Starship Enterprise from the Star Trek TV series. The Enterprise was used for approach and landing tests where it was dropped from the top of a Boeing 747 airliner. The original plan was to refit Enterprise for flight, but it was determined that it would be cheaper to build a new shuttle from an airframe that was built as a test article. This new shuttle became OV-99 Challenger. It was later considered to refit Enterprise for flight after the loss of Challenger, but instead, a new shuttle, OV-105 Endeavour, was built from spare parts. Enterprise did serve NASA one last time after the Columbia accident. Wing leading edge panels were removed from Enterprise and used in testing as part of the accident investigation.