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
Mikhail Gorbachev Intermediate-Range Nuclear Forces Treaty, saying the move "is not the work of a great mind." Gorbachev also said that "all agreements aimed at nuclear disarmament and the limitation of nuclear weapons must be preserved for the sake of life on Earth." Gorbachev signed the U.S.-Soviet nuclear disarmament treaty in 1987 with President Ronald Reagan. Gorbachev hailed the George H.W. Bush’s role in helping end the Cold War following the news of the former President's death, saying: "We had a chance to work together during the years of tremendous changes. It was a dramatic time that demanded great responsibility from everyone.