IN SPACE - JULY 15: In this handout image provided by the National Aeronautics and Space Administration (NASA), STS-135 crew consisting of NASA astronauts Chris Ferguson, Doug Hurley, Sandy Magnus and Rex Walheim; the Expedition 28 crewmembers are JAXA astronaut Satoshi Furukawa, NASA astronauts Ron Garan and Mike Fossum, and Russian cosmonauts Andrey Borisenko, Alexander Samokutyaev and Sergei Volkov form a microgravity circle to pose for a portrait aboard the orbiting complex's Kibo laboratory of the Japan Aerospace Exploration Agency on the International Space Station July 15, 2011 in space. Space shuttle Atlantis is on the last leg of a 12-day mission to the International Space Station where it delivered the Raffaello multi-purpose logistics module packed with supplies and spare parts. This was the final mission of the space shuttle program, which began on April 12, 1981 with the launch of Colombia.