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KENNEDY SPACE CENTER, FLA. -- Flags are flying at the entrance to Launch Pad 39A, where Space Shuttle Atlantis has come to a stop. At left are the rotating and fixed service structures; at right is the 300-gallon water tower. The shuttle has spent six hours rolling out to Pad 39A, leaving the Vehicle Assembly Building at 8:19 a.m. The mission payload aboard Space Shuttle Atlantis is the S3/S4 integrated truss structure, along with a third set of solar arrays and batteries. The crew of six astronauts will install the truss to continue assembly of the International Space Station. Launch is targeted for March 15. Photo credit: NASA/Ken Thornsley