Program Closure — 2 museum-grade prints that set the mood. STS-135 launched 8 July 2011 at 15:29 EDT from Kennedy Space Center Launch Complex 39A aboard Atlantis — the 135th and final flight of NASA's Space Shuttle program after thirty years and 135 missions. The crew delivered ISS logistics via the Raffaello MPLM before landing 21 July 2011 on KSC Runway 15, ending an era of reusable winged orbiters. Apollo 17 marked the last time humans walked on the Moon — a closing chapter that would stand for over half a century as subsequent programs focused on low Earth orbit and robotic deep space. Harrison Schmitt, a geologist trained for Apollo science returns, validated the program's late pivot toward field geology on another world.