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This book explains how the achievements of the Space Shuttle, the world’s first reusable manned spacecraft, were built on the foundation of countless technical challenges. Through thick and thin, the Space Shuttle remained the centerpiece of the American human spaceflight program for three decades. In addition to deploying satellites, planetary probes and, of course, the Hubble Space Telescope, it delivered astronauts to the Mir space station and assembled and sustained the International Space Station. Yet the path to these incredible achievements was never an easy one, with some obstacles resulting in the loss of life and other major consequences that plagued the fleet throughout its operational career. The book adopts a challenge-by-challenge approach, focusing on specific difficulties and how (if at all) they were fully overcome. Going beyond the technical issues, it relates the human stories of each incident and how changes were effected in order to make the shuttle an exceptionally safer – though still experimental – flying machine.