The tensest times were during the Berlin Blockade (1948–1949), the Korean War (1950–1953), the Suez Crisis (1956), the Berlin Crisis of 1961 , the Cuban missile crisis (1962), the Vietnam War (1959–1975), the Yom Kippur War (1973), the Soviet war in Afghanistan (1979–1989), the Soviet downing of Korean Air Lines Flight 007 (1983), and the "Able Archer" NATO military exercises (1983).