What was the specific launch date for Mission STS-135?
Answer
July 8, 2011
The monumental event marking the end of the Space Shuttle Program, the launch of STS-135 aboard Atlantis, occurred on Saturday, July 8, 2011. This date signifies the final time the colossal Space Shuttle stack, comprising the Orbiter, the External Tank, and the two Solid Rocket Boosters, lifted off from Launch Pad 39A. The landing, which completed the mission and formally retired the fleet, took place later, on July 21, 2011.

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