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
Foreign policy of the Ronald Reagan administration but Reagan recognized the real change in the direction of the Soviet leadership, and shifted to skillful diplomacy to personally push Gorbachev further with his reforms. Reagan sincerely believed that if he could persuade the Soviets to simply look at the prosperous American economy, they too would embrace free markets and a free society. At a speech given at the Berlin Wall on the city's 750th birthday, Reagan pushed Gorbachev further in front of 20,000 onlookers: "General Secretary Gorbachev, if you seek peace, if you seek prosperity for the Soviet Union and Eastern Europe, if you seek liberalization: Come here