Space Shuttle Endeavour is scheduled to launch on mission STS-118 on 8 August 2007. During the mission, Endeavour will carry into orbit the S5 truss. The mission is the 22nd flight to the International Space Station and will mark the first flight of Mission Specialist Barbara Morgan, the teacher-turned-astronaut whose association with NASA began more than 20 years ago. STS-118 will be the first flight since 2002 for Endeavour, which has undergone extensive modifications, including the addition of safety upgrades already added to orbiters Discovery and Atlantis.