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 concrete agreement immediately, or for leading to a staged elimination of nuclear weapons. Reagan was persuaded by Richard Perle to reject limits on SDI testing because Perle thought that the far-reaching arms control deal proposed by the Soviets would improve the Soviet domestic economy and have a beneficial impact on the Soviet standard of living. In the long term, nevertheless, this would culminate in the signing of the Intermediate-Range Nuclear Forces (INF) Treaty in 1987, after Gorbachev had proposed this elimination on 22 July 1987 (and it was subsequently agreed on in Geneva on 24 November). In February 1988, Gorbachev