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The Soviet SS-20 was an intermediate-range ballistic missile with a nuclear warhead and was one of the classes of missiles subject to the INF Treaty. The Soviet Union began to demolish its nuclear stockpile at Kapustin Yar, a missile test site, in July 1988. This plaque showcases a fragment of the last Soviet SS-20 missile, which was destroyed on May 12, 1991. Photo: National Archives, Ronald Reagan Presidential Library and Museum

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