Presidency of Ronald Reagan to forestall the possibility of an agreement between the United States and the Soviet Union. Nonetheless, both Gorbachev and Reagan agreed to continue arms control negotiations at the October 1986 Reykjavík Summit. At the summit, Gorbachev and Reagan closed in on an agreement to greatly reduce or eliminate the nuclear stockpiles of both the U.S. and the Soviet Union over a ten-year period, but the deal collapsed due to disagreements regarding SDI development. Reagan attacked Gorbachev in a 1987 speech delivered in West Berlin, but negotiations continued. Gorbachev and Reagan broke the impasse by agreeing to negotiate separate treaties on
Presidency of Ronald Reagan negotiations with the United States over arms control. As his influence on domestic affairs waned during his second term, Reagan increasingly focused on relations with the Soviet Union. Reagan recognized the change in the direction of the Soviet leadership under Gorbachev, and shifted to diplomacy, with a view to encourage the Soviet leader to pursue substantial arms agreements. Reagan's personal mission was to achieve a world free of nuclear weapons, which according to Jack F. Matlock Jr., Reagan's ambassador to Moscow, he regarded as "totally irrational, totally inhumane, good for nothing but killing, possibly destructive of life on earth and