The confederacy did not want to enlist any African America soldiers because they were seen as lesser to White people. The Union enlisted African Americans because they wanted to fight, and it would help end the war faster since they had more resources than the confederacy. However, African Americans were still seen as lesser by the Union also
The U-2 incident was over a US CIA spy plane flying over the Soviet Union and taking photos of military installations and it was shot down by a missile from the Soviet Union so it caused a serious rift in relations between the two superpowers.