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
Ronald Reagan deal was achieved. Speaking at the Berlin Wall on June 12, 1987, Reagan challenged Gorbachev to go further, saying "General Secretary Gorbachev, if you seek peace, if you seek prosperity for the Soviet Union and Eastern Europe, if you seek liberalization, come here to this gate! Mr. Gorbachev, open this gate! Mr. Gorbachev, tear down this wall!" At Gorbachev's visit to Washington in 1987, he and Reagan signed the Intermediate-Range Nuclear Forces Treaty (INF Treaty) at the White House, which eliminated an entire class of nuclear weapons. The two leaders laid the framework for the Strategic Arms Reduction Treaty, or