Space Shuttle Atlantis has just launched from the Kennedy Space Center in Florida. STS-135 marks the final flight for the shuttle program, 30 years after Columbia touched the sky during STS-1. The mission summary (PDF) outlines STS-135's crew and event timeline. NASA's launch blog has been following the countdown all morning, and our own CmdrTaco has been tweeting live from on-site. NASA TV is also being streamed live. Meteorological reports for the launch looked doubtful at first, but a gap in the bad weather at just the right time allowed everything to proceed as planned. Atlantis successfully reached its preliminary orbit in what a NASA official called a "flawless" launch.