talks between the US and the USSR to reduce the number of their nuclear weapons. Reductions were made after President Ronald Reagan and the Soviet leader Mikhail Gorbachev signed the INF Treaty in 1987 and President Bush and Gorbachev signed the STARTtreaty in 1991. Another START treaty between the US and Russia did not come into force, and discussions about a third were not concluded. In 2010 President Obama of the US and President Medvedev of Russia signed the New START treaty, which limits the number of nuclear weapons far more.
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