Space Shuttle Atlantis (Orbiter Vehicle designation: OV‑104) is a retired Space Shuttle orbiter vehicle which belongs to NASA, the spaceflight and space exploration agency of the United States. Atlantis was manufactured by the Rockwell International company in Southern California and was delivered to the Kennedy Space Center in Eastern Florida in April 1985. Atlantis is the fourth operational and the second-to-last Space Shuttle built. Its maiden flight was STS-51-J made from October 3 to 7, 1985.
Atlantis embarked on its 33rd and final mission, and the final mission of the Space Shuttle program, STS-135, on July 8, 2011. STS-134 by Endeavour was expected to be the final flight before STS-135 was authorized in October 2010.