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As NASA’s space shuttles head towards retirement, events are starting to happen now that are “lasts” for the program. On April 13, 2010 Atlantis was rolled over to the Vehicle Assembly Building for what is likely the last time. The workers at Kennedy Space Center are preparing Atlantis for its final flight, STS-132, currently scheduled for launch in mid-May 2010, and in the VAB the orbiter will be mated to the External Tank and solid rocket boosters. Thanks to photographer Alan Walters, Universe Today hopes to be able to chronicle these final events as the storied space shuttle program comes to an end. Of course, with NASA’s future seemingly in a state of flux, there’s a small possibility additional shuttle flights will be added, but enjoy this gallery of Alan’s wonderful pictures showing what is scheduled to be Atlantis’ final rollover.