NASA's Space Shuttle Discovery sits atop it's launch pad awaiting it's final flight following the rollback of the Rotating Service Structure (RSS) at 8:00 pm EST.   Mike Lynaugh

February 23, 2011 - NASA's Space Shuttle Discovery sits atop it's launch pad awaiting it's final flight following the rollback of the Rotating Service Structure (RSS) at 8:00 pm EST.

Mike Lynaugh