ISTR being told by someone that Greenham was something of a red herring, and that the USAF was quietly shipping far more interesting things into Molesworth via Alconbury.
There is some evidence in the public domain that Molesworth was a nuclear weapons store, but this may have been more akin to RAF Faldingworth and RAF Barnham than a Cruise Missile Site.
Jacko makes a good point though - an example of short-termism at its worst.
STH