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 elimination of intermediate-range nuclear weapons in Europe and his strategy for eliminating all of the Soviet nuclear arsenal by the year 2000 (often referred to as the 'January Proposal'). He also began the process of withdrawing troops from Afghanistan and Mongolia on 28 July. Nonetheless, many observers, such as Jack F. Matlock, Jr. (despite generally praising Gorbachev as well as Reagan), have criticized Gorbachev for taking too long to achieve withdrawal from the Afghanistan War, citing it as an example of lingering elements of "old thinking" in Gorbachev. On 11 October 1986, Gorbachev and Reagan met at Höfði house in