On a hot July morning in 2011, nearly a million spectators lined the Florida coast to witness history. At 11:29 a.m. EDT on 8 July, Space Shuttle Atlantis lifted from Launch Complex 39A on STS-135, the 135th and final mission of the Space Shuttle Program. Commander Christopher Ferguson, Pilot Douglas Hurley, and Mission Specialists Sandra Magnus and Rex Walheim carried the Raffaello multi-purpose logistics module to the International Space Station, delivering more than 8,000 pounds of supplies and spare parts to sustain the outpost after the shuttles retired. The crew also tested technologies for robotic satellite refueling and returned a failed ammonia pump for engineering analysis. For twelve days, eighteen hours, and twenty-eight minutes, Atlantis danced with the station one last time, then came home to the Shuttle Landing Facility at Kennedy Space Center on 21 July at 5:57 a.m. EDT. It was the 26th night landing in shuttle history and the end of a thirty-year era. Atlantis had spent 307 days in space across 33 flights, traveling nearly 126 million miles. As the vehicle rolled to a stop, a chapter closed—not on American human spaceflight, but on a revolutionary machine that had launched satellites, built a space station, and carried 833 crew members into orbit.