Space Shuttle gliding and landing; it was originally intended to be outfitted for orbital operations after the test program, but it was found more economical to upgrade the structural test article STA-099 into orbiter "Challenger" (OV-099). An additional test article, dubbed "Pathfinder" (OV-098), was built for form and fit tests, and is on display at the Alabama Space and Rocket Center in Huntsville, AL. "Challenger" disintegrated 73 seconds after launch in 1986, and "Endeavour" was built as a replacement from structural spare components. Building "Endeavour" cost about US$1.7 billion. "Columbia" broke apart over Texas during re-entry in 2003. A Space Shuttle launch
Space policy of the United States NASA funding improved somewhat, the Apollo–Soyuz Test Project occurred and the Shuttle program continued, and the Office of Science and Technology Policy was formed. The Jimmy Carter administration was also fairly inactive on space issues, stating that it was "neither feasible nor necessary" to commit to an Apollo-style space program, and his space policy included only limited, short-range goals. With regard to military space policy, the Carter space policy stated, without much specification in the unclassified version, that "The United States will pursue Activities in space in support of its right of self-defense." The first flight of the Space Shuttle