Members of the crew check out Integrated Truss Structure ITS S0 which will be part of the payload.

In the Operations and Checkout Building, during a Crew Equipment Interface Test, members of the STS-110 crew check out Integrated Truss Structure (ITS) S0, which will be part of the payload on their mission. At left is Mission Specialist Jerry L. Ross, with a camera. Standing (center) are Mission Specialists Steven L. Smith and Rex J. Walheim. Other crew members (not shown) are Commander Michael J. Bloomfield, Pilot Stephen N. Frick, and Missin Specialists Ellen Ochoa and Lee M. Morin. The ITS S0 is part of the payload on the mission. It is the center segment 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 February 2002