STS 14

STS-14 was a planned Space Shuttle mission to deliver and install a military payload into orbit. The mission was cancelled prior to launch due to budgetary constraints and shifting priorities within the U.S. Department of Defense and NASA. Details regarding the specific nature of the payload remain classified, but it was widely speculated to involve intelligence gathering or communications capabilities. The mission was originally slated to launch in the late 1980s or early 1990s using either the Space Shuttle Discovery, Atlantis, or Endeavour. Following the cancellation of STS-14, the intended payload was reportedly reconfigured for deployment on an unmanned launch vehicle.