Technology and history are tightly interwoven at the Lyndon B. Johnson Space Center (JSC) where astronauts are trained and U.S. manned space flights are monitored. Drawn to the natural business development advantages flowing from JSC, which annually administers over $4 billion in federal aerospace contracts, 50 contractors perform leading-edge work managing the Space Shuttle, International Space Station, astronaut training, advanced human support technology, biomedical research and space medicine.