The U.S. Air Force C-5 prepares to land on NASA Kennedy Space Center's Shuttle Landing Facility. The aircraft carries the Express Logistics Carrier 4, or ELC4, part of the payload for the STS-133 mission. Space shuttle Endeavour will deliver the ELC4 and ELC3 with critical spare components to the International Space Station on the mission. Endeavour's launch is targeted for late July in 2010. Photo credit: NASA/Amanda Diller