The space shuttle Discovery left California's Edwards Air Force Base on Sunday morning on its cross-country journey back to NASA's Kennedy Space Center.
The shuttle is being ferried back to Florida on a modified Boeing 747 known as the Shuttle Carrier Aircraft.
The plane was to make several stops for refueling over the course of the 2,500-mile trip -- in Amarillo, Texas, on Sunday and at Barksdale Air Force Base in Shreveport, La., overnight before arriving in Florida today.
