STS-135 video: Narrated flow tapes

VIDEO: The winged spaceship Columbia returned to Earth with a pinpoint landing at Edwards Air Force Base on this day 35 years ago, concluding the maiden flight of the space shuttle.

Navigating the 48-mile Panama Canal that slices through the isthmus, the final shipment of a space shuttle external fuel tank emerged into the Pacific for a three-week trek to California.

The last remaining external fuel tank built for the space shuttle program but never flew will depart its factory in New Orleans on Tuesday for a long sea voyage to the California Science Center in Los Angeles.