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Period: to
1970's
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Super Bowl IV: The Kansas City Chiefs beat the heavily favored Minnesota Vikings 23–7.
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Black Sabbath's debut album, Black Sabbath released; often regarded as the first true heavy metal album
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A bomb being constructed by members of the Weathermen and meant to be planted at a military dance in New Jersey, explodes, killing 3 members of the organization.
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American President Richard Nixon signs the Public Health Cigarette Smoking Act into law, banning cigarette television advertisements in the United States with effect from January 1, 1971.
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Kent State shootings: Four students at Kent State University in Ohio are killed and 9 wounded by Ohio State National Guardsmen, at a protest against the incursion into Cambodia.
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June 10 – U.S. President Richard Nixon signs a measure lowering the voting age to 18.
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The U.S. Food and Drug Administration (FDA) is subordinated to Public Health Service.
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August 26 – The Women's Strike for Equality takes place down Fifth Avenue in New York City.
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Vietnam War – Operation Jefferson Glenn: The United States 101st Airborne Division and the South Vietnamese 1st Infantry Division initiate a new operation in Thua Thien Province (the operation ends in October 1971).
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National Educational Television ends operations, being succeeded by PBS.
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Southern Airlines Flight 932 crashes in Wayne County, West Virginia; all 75 on board, including 37 players and 5 coaches from the Marshall University football team, are killed.
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The United States Environmental Protection Agency begins operations.
