Space shuttle Atlantis Commander Chris Ferguson, right, Pilot Doug Hurley, second from right, Mission Specialists Sandy Magnus, second from left, and Rex Walheim speak during presentation at the Rose ... more 
Space shuttle Atlantis Commander Chris Ferguson, right, Pilot Doug Hurley, second from right, Mission Specialists Sandy Magnus, second from left, and Rex Walheim speak during presentation at the Rose Center for Earth and Space, Cullman Hall of the Universe, Tuesday, Aug. 16, 2011 in New York. The four astronauts from space shuttle Atlantis' STS 135 mission spoke to visitors to the American Museum of Natural History. (AP Photo/Mary Altaffer) less 
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Associated Press | Photo By Mary Altaffer
Tue, Aug 16, 2011 1:00 PM EDT