At 11:29 a.m. EDT, the solid rocket boosters ignited and Atlantis tore itself from Pad 39A at Kennedy Space Center. The four astronauts aboard were riding the last scheduled flight of the Space Shuttle program. Its primary mission was to deliver the Raffaello multipurpose logistics module, packed with over 8,000 pounds of supplies and spare parts, to the International Space Station. The launch appeared routine, a testament to the program's operational maturity. Yet the crowd of nearly one million spectators along Florida's Space Coast understood they were witnessing an ending.
The shuttle's retirement had been decided seven years prior, following the Columbia disaster. The remaining orbiters—Discovery, Endeavour, and Atlantis—would fly out their manifest. Atlantis, flying mission STS-135, was the last to go. Its flight closed a chapter that began in 1981 with Columbia's maiden voyage. The program's legacy is a complex ledger of monumental achievement and profound tragedy. It built the ISS, deployed the Hubble Space Telescope, and demonstrated reusable spacecraft operations. It also claimed fourteen lives in the Challenger and Columbia accidents.
A common misconception is that the final flight marked the end of American human spaceflight capability. NASA had deliberately ceded Earth-orbit transport to commercial entities like SpaceX and Boeing, betting on a new model. The agency's focus shifted to deep space with the Orion spacecraft and Space Launch System. The shuttle's retirement created a nine-year gap where the United States relied on Russian Soyuz capsules for astronaut transport to the ISS.
The sight of Atlantis rolling to a stop on July 21, 2011, sealed the vehicle's transition from workhorse to museum piece. It now resides on display at Kennedy Space Center. The program's end forced a fundamental re-evaluation of how humanity accesses low-Earth orbit, trading a government-owned system for a mix of public and private partnerships that define the current era.