I remember as a kid going to Space Academy in Huntsville, AL. A camp counselor told us how the engines came to find a home at the Rocket Park of the Alabama Space and Rocket Center. NASA had placed the Saturn V on tour to show off this amazing machine - this particular rocket never went in space, but it was a _functional_ vehicle. The story goes that once the rocket was set up, the governor rallied for the rocket to be labeled a historical landmark. And since it really is an incredible chunk of American history, the motion passed.
And, as it turns out, you can't move historical landmarks. Apparently NASA was furious, but played it cool.
Or so a museum counselor told a band of 7th graders.