How does the U2 spy plane impact US-Soviet Relations? Why?

However, after serving less than two years, he was released in exchange for a captured Soviet agent in the first-ever U.S.-USSR “spy swap.” The U-2 spy plane incident raised tensions between the U.S. and the Soviets during the Cold War (1945-91), the largely political clash between the two superpowers and their allies

Answer and Explanation:

Tell you what the three x's means??