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 occurred in April 1981, early in President Ronald Reagan's first term. Reagan in 1982 announced a renewed active space effort, which included initiatives such as privatization of the Landsat program, a new commercialization policy for NASA, the construction of Space Station Freedom, and the military Strategic Defense Initiative. Late in his term as president, Reagan sought to increase NASA's budget by 30 percent. However, many of these initiatives would not be completed as planned. The January 1986 Space Shuttle Challenger disaster led to the Rogers Commission Report on the causes of the disaster, and the National Commission on Space report