Endeavour's payload bay is open for payload configuration work in Orbiter Processing Facility bay 2. The orbiter is the vehicle designated for mission STS-118, scheduled to launch in late June. The mission will continue space station construction by delivering a third starboard truss segment, S5, as well as carrying the External Stowage Platform 3. The crew comprises six astronauts: Commander Scott Kelly, Pilot Charles Hobaugh and Mission Specialists Dr. Dafydd (Dave) Williams, Barbara Morgan, Richard Mastracchio and Tracy Caldwell. Williams represents the Canadian Space Agency.