Final answer:
Summits between the U.S. and the Soviet Union under Reagan aimed at reducing tensions and resulted in the Intermediate Nuclear Forces Treaty.
Explanation:
The summits between the U.S. and the Soviet Union during Reagan's presidency were significant in signaling a shift towards improved relations and efforts to reduce Cold War tensions. Reagan and Gorbachev's meetings in Geneva and Reykjavik led to the Intermediate Nuclear Forces Treaty of 1987, which marked a substantial reduction in nuclear arsenals.
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