The silhouette cast against one piece of Space Shuttle Atlantis shows NASA administrator Charles Bolden shaking hands with various workers charged with preparing the vehicle for its final flight. At the Kennedy Space Center in Cape Canaveral, Florida, on May 31, 2011, Bolden met with the workers on top of the Mobile Launch Platform as the Shuttle made its way from High Bay 3 in the Vehicle Assembly Building to Launch Pad 39A.

"The 3.4-mile trek, known as rollout, took about seven hours to complete," according to NASA. "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 mission, scheduled for July 8, will also be the last for the Space Shuttle Program.

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Image: NASA.