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Space shuttle Atlantis sits on Launch Pad 39A at NASA's Kennedy Space Center in Florida after rollout from the Vehicle Assembly Building. The shuttle sits atop the mobile launcher platform, which is carried by the crawler-transporter beneath. At left is the rotating service structure with the payload changeout room that allows transfer of payloads from a canister into the shuttle's payload bay. Next to the shuttle is the fixed service structure with its 80-foot lightning mast on top. First motion was at 3:54 a.m. EDT and Atlantis was secured on the pad at 11:17 a.m. The 3.4-mile trip took about seven-and-a-half hours. Atlantis is targeted to lift off May 12 to service NASA's Hubble Space Telescope. During Atlantis' 11-day mission, the crew of seven astronauts will make the final shuttle flight to Hubble. During five spacewalks, they will install two new instruments, repair two inactive ones and replace components. The result will be six working, complementary science instruments with capabilities beyond what is now available, and an extended operational lifespan for the telescope through at least 2014.