Changes

:Columbia was the first Space Shuttle orbiter to be delivered to NASA's Kennedy Space Center, Fla., in March 1979. Columbia and the STS-107 crew were lost Feb. 1, 2003, during re-entry. The Orbiter Challenger was delivered to KSC in July 1982 and was destroyed in an explosion during ascent in January 1986. Discovery was delivered in November 1983. Atlantis was delivered in April 1985. Endeavour was built as a replacement following the Challenger accident and was delivered to Florida in May 1991. An early Space Shuttle Orbiter, the Enterprise, never flew in space but was used for approach and landing tests at the Dryden Flight Research Center and several launch pad studies in the late 1970s.  

:Columbia was the first Space Shuttle orbiter to be delivered to NASA's Kennedy Space Center, Fla., in March 1979. Columbia and the STS-107 crew were lost Feb. 1, 2003, during re-entry. The Orbiter Challenger was delivered to KSC in July 1982 and was destroyed in an explosion during ascent in January 1986. Discovery was delivered in November 1983. Atlantis was delivered in April 1985. Endeavour was built as a replacement following the Challenger accident and was delivered to Florida in May 1991. An early Space Shuttle Orbiter, the Enterprise, never flew in space but was used for approach and landing tests at the Dryden Flight Research Center and several launch pad studies in the late 1970s.  

:The Shuttle has the most reliable launch record of any rocket now in operation. Since 1981, it has boosted more than 1.36 million kilograms (3 million pounds) of cargo into orbit. More than than 600 crew members have flown on its missions. Although it has been in operation for almost 20 years, the Shuttle has continually evolved and is significantly different today than when it first was launched. NASA has made literally thousands of major and minor modifications to the original design that have made it safer, more reliable and more capable today than ever before.  

:The Shuttle has the most reliable launch record of any rocket now in operation. Since 1981, it has boosted more than 1.36 million kilograms (3 million pounds) of cargo into orbit. More than than 600 crew members have flown on its missions. Although it has been in operation for almost 20 years, the Shuttle has continually evolved and is significantly different today than when it first was launched. NASA has made literally thousands of major and minor modifications to the original design that have made it safer, more reliable and more capable today than ever before. After 135 missions, the Space Shuttle flew its last flight on July 8, 2011.  

:In 1992, the U.S. and the new Russian Federation renewed the 1987 space cooperation agreement and issued a "Joint Statement on Cooperation in Space." Subsequent additions to the agreement outline the development of the NASA-Mir program.  From February 1994 to June 1998, space shuttles made 11 flights to the Russian space station Mir, and American astronauts spent seven residencies onboard Mir. Space shuttles also conducted crew exchanges and delivered supplies and equipment.<ref> http://www.nasa.gov/returntoflight/system/system_STS.html </ref>  <ref> http://www.nasa.gov/mission_pages/shuttle-mir/index.html  </ref>

:In 1992, the U.S. and the new Russian Federation renewed the 1987 space cooperation agreement and issued a "Joint Statement on Cooperation in Space." Subsequent additions to the agreement outline the development of the NASA-Mir program.  From February 1994 to June 1998, space shuttles made 11 flights to the Russian space station Mir, and American astronauts spent seven residencies onboard Mir. Space shuttles also conducted crew exchanges and delivered supplies and equipment.<ref> http://www.nasa.gov/returntoflight/system/system_STS.html </ref>  <ref> http://www.nasa.gov/mission_pages/shuttle-mir/index.html  </ref>

:The station now includes the Russian-built Zarya Module and the Zvezda Service Module, which contain the station’s living quarters and life-support systems; the U.S.-built Unity Connecting Module, providing docking ports for several station components; the U.S.-built Destiny Laboratory, which expands the station’s scientific capabilities with experiment compartments that allow nearly continuous scientific research and provide additional life support and robotic capabilities; the U.S.-built Quest Airlock, a doorway to space that supports station-based spacewalks; the Canadian-built Canadarm2, a new-generation robotic arm that gives the station a movable space crane; the Russian-built Pirs docking compartment, which adds additional spacewalking and docking capabilities to the station; and truss segments, which serve as the framework for additional station segments. Japanese and European research laboratories are ready for delivery to expand the station’s research capabilities even more. <ref> http://spaceflight.nasa.gov/spacenews/factsheets/index.html </ref>

:The station now includes the Russian-built Zarya Module and the Zvezda Service Module, which contain the station’s living quarters and life-support systems; the U.S.-built Unity Connecting Module, providing docking ports for several station components; the U.S.-built Destiny Laboratory, which expands the station’s scientific capabilities with experiment compartments that allow nearly continuous scientific research and provide additional life support and robotic capabilities; the U.S.-built Quest Airlock, a doorway to space that supports station-based spacewalks; the Canadian-built Canadarm2, a new-generation robotic arm that gives the station a movable space crane; the Russian-built Pirs docking compartment, which adds additional spacewalking and docking capabilities to the station; and truss segments, which serve as the framework for additional station segments. Japanese and European research laboratories are ready for delivery to expand the station’s research capabilities even more. <ref> http://spaceflight.nasa.gov/spacenews/factsheets/index.html </ref>

*NASA plans to continue human space flight with '''Project Constellation''', which consists of the Orion spacecraft (similar to the Project Apollo Command Module, but larger and with up to date flight systems) and the Ares I, a launch vehicle.  The Ares is similar to the solid fuel rocket from the current Space Shuttle Solid Rocket Booster (SRB), but more powerful, and has a second stage.  The first launch is hoped for in 2011 and the first human launch in 2014.  Together, these will be used for Lunar and Mars missions.  <ref>http://www.nasa.gov/mission_pages/constellation/orion/index.html</ref>

*NASA had planned to continue human space flight with '''Project Constellation''', which consists of the Orion spacecraft (similar to the Project Apollo Command Module, but larger and with up to date flight systems) and the Ares I, a launch vehicle.  The Ares is similar to the solid fuel rocket from the current Space Shuttle Solid Rocket Booster (SRB), but more powerful, and has a second stage.  The first launch was hoped for 2011 and the first human launch in 2014<ref>http://www.nasa.gov/mission_pages/constellation/orion/index.html</ref>.  Due to budget cuts, however, funding was removed for the program in the 2011 federal budget, and the current status of the project is unknown.

==NASA Unmanned Missions==

==NASA Unmanned Missions==