Scheduled for launch on October 2, 2003, the shuttle Endeavour was to have delivered the S3/S4 truss segment to the International Space Station. No landing date was announced yet, however. The crew would've consisted of 6 astronauts due to the weight of the truss segment: Commander Rick Sturckow, Pilot Mark Polansky, and Mission Specialists Jim Reilly, Pat Forrester, Rick Mastracchio, and Joan Higginbotham. The Columbia disaster later cancelled the flight and some of the crew had to wait until June 2007 when 4 other crew members joined Sturckow, Reilly, and Forrester: Lee Archambault, Steve Swanson, John Olivas, and Clay Anderson. Anderson was to join the then-current expedition aboard the outpost and Sunita Williams was to land with the replacement shuttle for the remanifested STS-117: Atlantis.