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
17th G7 summit "core members" of the international forum: British Prime Minister John Major sent a letter to other members of the G7, asking for their permission to invite Mikhail Gorbachev, who has been pressing to come to London to plead for more Western economic support for his country. Pressure to invite Mr. Gorbachev had come mainly from the leaders of France, Germany, and Italy who have made public appeals for him to be invited to attend; but Britain sent the official invitation inviting the Soviet Union to participate. A wry comment which was oft repeated during the summit was that G7 had