(01/23/2002) -- In the Operations and Checkout Building, members of the STS-110 crew take a break from checking equipment to pose for a photo: (from left) Mission Specialists Steven Smith, Rex Walheim, Jerry Ross and Lee Morin. Other crew members (not shown) are Commander Michael J. Bloomfield, Pilot Stephen N. Frick, and Mission Specialist Ellen Ochoa. Part of the payload on the mission is the Integrated Truss Structure S0. It is the center segment that they will be installing on the International Space Station, part of the 300-foot (91-meter) truss attached to the U.S. Lab. By assembly completion, four more truss segments will attach to either side of the S0 truss. STS-110 is currently scheduled to launch in April 2002