51³Ô¹ÏÍø

403574 02: The STS-110 crew wave as they walk out of the Operations and Checkout Building April 8, 2002 at the Kennedy Space Center, FL. (Front, L to R) Pilot Stephen N. Frick and Commander Michael J. Bloomfield, (2nd row L to R) Mission Specialists Rex J. Walheim and Ellen Ochoa, (3rd row, L to R) Jerry L. Ross and Lee M.E. Morin, and (rear) Mission Specialist Steven L. Smith are part of the 13th assembly flight to the International Space Station, carrying the S0 Integrated Truss Structure and Mobile Transporter (MT). The 11-day mission features four spacewalks to attach the S0 truss, which will become the backbone of the Space Station. (Photo Courtesy of NASA/Getty Images)