Serioualy Neat SH%$: Air Force Declassifies Constant Peg

Constant Peg, where the USAF evaluated Warsaw Pact aircraft, largely from defections, during the Cold War, has been declassified.

I had no idea that it was still classified, as I recall reading about the program in the context of the death of a USAF Brigadier General around 1984, but it means that this information is now available to the public.