NASA Administrator Charles Bolden is seen in silhouette, left, as he shook hands with workers atop the Mobile Launch Platform as space shuttle Atlantis rolled out of High Bay 3 in the Vehicle Assembly Building to Launch Pad 39A for its final flight, Tuesday, May 31, 2011, at Kennedy Space Center in Cape Canaveral, Fla. The 3.4-mile trek, known as rollout, took about seven hours to complete. On STS-135, the orbiter’s final, Atlantis will carry the Raffaello multipurpose logistics module to deliver supplies and spare parts to the International Space Station. The launch of STS-135 is targeted for July 8. Image Credit: NASA/Bill Ingalls