Why did the Paris summit of 1960 fail?

The Paris Summit of 1960 failed primarily due to the escalating tensions between the United States and the Soviet Union, particularly after the U-2 incident where an American spy plane was shot down over Soviet airspace. This incident led to a breakdown in trust and communication between the two superpowers, with Soviet Premier Nikita Khrushchev walking out of the summit after demanding an apology from President Eisenhower, which was not forthcoming. Additionally, disagreements over disarmament and other key issues further contributed to the failure of the summit to achieve any significant agreements.