Space Shuttle Mission STS-129 is scheduled to be flown by Space Shuttle Atlantis. STS-129 is a mission to the International Space Station. The launch date for the mission is scheduled for November 12, 2009.The primary focus for STS-129 will be staging spare components outside the station. The 11-day flight is scheduled to include at least three spacewalks. The payload bay will carry two large External Logistics Carriers holding two spare gyroscopes, two nitrogen tank assemblies, two pump modules, an ammonia tank assembly, a spare latching end effector for the station's robotic arm, a spare trailing umbilical system for the Mobile Transporter, and a high-pressure gas tank.