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1991 – The World Wide Web is opened to the public.
1970 – Organized by Mexican American labor union leader César Chávez, the Salad Bowl strike, the largest farm worker strike in U.S. history, begins.
1966 – Lunar Orbiter 1 takes the first photograph of Earth from orbit around the Moon.
1927 – Italian anarchists Sacco and Vanzetti are executed after a lengthy, controversial trial.
1904 – The automobile tire chain is patented.
1831 – Nat Turner's rebellion of enslaved Virginians is suppressed.
1784 – Western North Carolina (now eastern Tennessee) declares itself an independent state under the name of Franklin; it is not accepted into the United States, and only lasts for four years.
1775 – American Revolutionary War: King George III delivers his Proclamation of Rebellion to the Court of St James's stating that the American colonies have proceeded to a state of open and avowed rebellion.
1572 – French Wars of Religion: Mob violence against thousands of Huguenots in Paris results in the St. Bartholomew's Day massacre.