CAPE CANAVERAL, FL - SEPTEMBER 21: Crew members exit a modified Boeing 747 shuttle carrier with Space Shuttle Discovery mounted atop after landing at the shuttle landing facility at NASA's Kennedy Space Center on September 21, 2009 in Cape Canaveral, Florida. Discovery completed its mission to the International Space Station earlier in the month and was forced to land at Edwards Air Force Base in California after bad weather prevented a landing at Cape Canaveral.