Music.
Space shuttle Endeavour left the Vehicle Assembly Building in the middle of the night on April 17
on what is to be the last trip by a shuttle to NASA Kennedy Space Center's Launch Pad 39B.
Secured by eight bolts to a launch platform NASA calls a mobile launcher,
Endeavour was pointed to the sky as a crawler-transporter moved it about
four miles over a track built to support the crawler's immense weight.
Atlantis is poised on Launch Pad 39A awaiting a targeted May liftoff on a flight to service NASA's Hubble Space Telescope.
Endeavour will stand by on its launch pad in case it is needed for an unlikely
rescue mission if Atlantis suffers a problem in space.