NASA - Rockwell Space Shuttle - The two most flown orbiters meet for the final time. "Atlantis" is lined up to enter OPF to finish her transition and retirement. "Discovery" is done and has just vacated OPF and will soon depart KSC for the last time.
April 2012 - Shuttle Carrier Aircraft (SCA) is positioned beneath Space Shuttle Discovery in the mate-demate device at Kennedy Space Center in Florida. The orbiter was mated to the modified 747 for its flight to Washington, DC on April NASA Photo: