Tuesday marked the 30th anniversary of NASA's first shuttle flight and the 50th anniversary of man's first journey into space.
NASA built six shuttles originally designed to fly 100 missions.
The program has since far exceeded those expectations, making 135 trips into orbit.
There are only two launches left for NASA's shuttles. Space Shuttle Endeavour is set to blast off later this month, and Atlantis in June.
The three remaining space shuttles will then go to museums across the nation.
Shuttle Atlantis will stay in Cape Canaveral at the Kennedy Space Center Visitor Complex. Endeavour will head to the California Science Center. And Discovery's new home will be the Smithsonian Institute's branch in northern Virginia.