Apollo Command/Service Module
Of the three remaining Saturn V rockets on display, only the one at JSC is made up of segments intended for flight. The first stage of this Saturn V rocket is from SA-514 (originally intended for the cancelled Apollo 19), the second stage from SA-515 (originally intended for the cancelled Apollo 20), and the third stage from SA-513, which was not needed after it was replaced by the Skylab workshop. SA-513 was originally scheduled for the cancelled Apollo 18 - the rest of the rocket was used for Skylab). The Apollo Command/Service Module CSM-115a (intended for Apollo 19) completes the rocket as it would stand on the launchpad.