Edwards Air Force Base, UNITED STATES
The Space Shuttle Discovery leaves contrails in the sky as it comes in to land at Edwards Air Force Base...
The Space Shuttle Discovery leaves contrails in the sky as it comes in to land at Edwards Air Force Base in California, September 11, 2009. Discovery returned to earth from mission STS-128 which delivered supplies and equipment to the International Space Station. REUTERS/Danny Moloshok (UNITED STATES SCI TECH IMAGES OF THE DAY)