The Space Shuttle -

: A prototype used for atmospheric flight tests; it never flew in space but is currently on display at the Intrepid Sea, Air & Space Museum. How It Worked

: The "workhorse" of the fleet, it flew 39 missions, including the launch of the Hubble Space Telescope. The Space Shuttle

: Known for carrying the first American woman and African American into space; destroyed 73 seconds after liftoff in 1986. : A prototype used for atmospheric flight tests;

: Flew the final mission of the program (STS-135) in July 2011. it flew 39 missions

Five flight-worthy orbiters were constructed for the program:

40 Years Ago: Space Shuttle Enterprise rolls to the Pad - NASA

: The first shuttle to fly into space in 1981; tragically lost during re-entry in 2003.