Starten på det kalla kriget ja, där fanns det nog inte så mycket korrumperad underrättelsetjänstverksamhet...

sputniknews.com
Last Surviving Soviet Ace of Korean War Opens Up on Clandestine Ops Against US Air Force
For nearly forty years, direct Soviet involvement in the air war over Korea from 1950-1953 remained a tightly-kept state secret, with US planners long left speculating about how the young and relatively inexperienced Chinese and North Korean air forces could manage to shoot down so many planes belon...