Reykjavík Summit continued, and U.S.–Soviet relations – already strained by the failure of the Geneva Summit the previous year – were further strained by the Daniloff–Zakharov espionage affair. At Reykjavík, Reagan sought to include discussion of human rights, emigration of Soviet Jews and dissidents, and the Soviet invasion of Afghanistan. Gorbachev sought to limit the talks solely to arms control. The Soviets acceded to the "double-zero" proposal for eliminating INF weapons from Europe, as initially proposed by President Reagan in November 1981 (INF denoting "Intermediate-Range Nuclear Forces" as distinct from ICBMs, or intercontinental ballistic missiles). The Soviets also proposed to eliminate 50%
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