Actually incorrect Oscar. Here is why. Underestimation is when I know what my enemy has but I don't estimate the quantity or seriousness of it. And I get in and get beat up. But then, there is the element of surprise, the unknown that the enemy has and I may have heard about it. But have never actually dealt with it. Now THAT was the issue. It was the capability or agility and higher speed thrust of the Migs. Frankly speaking, Migs in their high times, still couldn't take a better shot than the F-86. Ask any USAF (or even PAF pilot actually). The American technology was radar guided guns even then and still much better. Our pilots didn't know the agility of Migs. When we came to find out, the F-86's temporarily and the F-16's permanently fixed the gap. You also have to realize, initially, the USN was involved. Historically, the USN operates twin engine jets or single engine for recon, etc. So dealing with the one engine high agility wasn't a normal thing. It was really an element of surprise. The F-86's in short term dealt with the Migs JUST fine as they were used to the single engine. Later, the aggressor squadron of the USN always included single engine highly maneuverable fighters for training so that the element of surprise could be removed. The F-16 took that single engine element out like it never existed and it still rocks.