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%
Reykjavík Summit whereas in reality, Matlock contends, they would have had little effect on research that was still in its very early stages. The talks finally stalled, Reagan asking if Gorbachev would "turn down a historic opportunity because of a single word", referring to his insistence on laboratory testing. Gorbachev asserted that it was a matter of principle, and the summit concluded. Despite getting unexpectedly close to the potential elimination of all nuclear weapons, the meeting adjourned with no agreement; however, both sides discovered the extent of the concessions the other side was willing to make. Human rights became a subject of