I think that Eisenhower embarrased himself, autorising the U-2 flights over Soviet Union. The incident ruined an international conference or reunion between USA / URRS. Sorry I dont remember exactly.
That's true. Although, it wasn't like the Soviets weren't spying on the west. In fact, the Soviets had quite the head start in spying. During WWII, the Soviets recruited 4 or 5 English men who all knew each other. If my memory is accurate, they were known as the Oxford 5, or something like that. Ultimately, their spying led to Soviet actions that caused the US to have to implement the Berlin Airlift.