Thanks to Brewster Buffalo's link to
Ares Homepage I found myself reading an onward link to
Red Eagles: America's Secret MiGs - Google Book Search
A very interesting read about MiG evaluation.
The only part that grated was seeing the Royal Air Force described as the "British RAF". Grrrrr
By chance, I later found this rather more recent MiG that's probably now at Area 51 or similar
Mig 25 Foxbat Iraqi Air Force - Flight Image of the Day