Space shuttle Discovery sits atop the Boeing 747 Shuttle Carrier Aircraft as it touched down at NASA's Kennedy Space Center in Florida at 12:05 p.m. EDT. The two-day return flight from Edwards Air Force Base in California began at 9:20 a.m. EDT Sept. 20. After three fueling stops that included an overnight stay in Louisiana, the piggybacked shuttle had to navigate through a line of showers across Louisiana and around Kennedy.