I've just bought "Red Eagles - America's Secret MiGs" by Steve Davies.
It's about the 1960s CONSTANT PEG MiG operations and the subsequent 4477th TES operations in the 70s and 80s at Tonopah with Frescos, Fitters and Floggers.
Excellent read with some great colour photos.
I nearly didn't buy it because my unread book pile is becoming unstable, but since it was the only one on the shelf, I bought it in case I never saw one again! I'm glad I did - half way through it already.
The book mentions that selected Red Flag pilots would spend a day off normal operations, fighting the MiGs. Was this just US pilots or did any foreign pilots do this?