Operation Wrath of God was carried out in retaliation for a massacre at one of these events, in which Black September members killed eleven Israelis in Munich.
During one of these events, Wladyslaw Kozakiewicz made an obscene gesture to a group of Soviets. Tensions during the 1956 Hungarian Revolution manifested at one of these events in the "blood in the water" incident. Operation Wrath of God was carried out in retaliation for a massacre at one of these events, in which Black September members killed eleven Israelis in Munich. In 1980, this event was boycotted in response to the USSR's invasion of Afghanistan. For 10 points, name this international sporting competition that takes place every four years.
During one of these events, Wladyslaw Kozakiewicz made an obscene gesture to a group of Soviets.
Summer Olympic Games [Accept specific years, anti-prompt on specific occurrences, esp if someone buzzes on the blood in the water clue with "polo match" or something]