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[UNKNOWN]: Thank you for watching!

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[SPEAKER_01]: On this day, August 21st, 1831.

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[SPEAKER_01]: Nat Turner's rebellion began in Southampton County, Virginia.

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[SPEAKER_01]: Turner and enslaved preacher led a group of enslaved people in an uprising against slavery.

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[SPEAKER_01]: The revolt was violently suppressed and the aftermath brought brutal retaliation against black communities,

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[SPEAKER_01]: The rebellion became one of the most significant acts of resistance against slavery in American history and exposed the deep fear and violence built into the system of enslavement.

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[SPEAKER_01]: Also on this day, August 21st, William Seward borrows received a patent for an adding machine, helping improve the way businesses handled calculations before modern computers.

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[SPEAKER_01]: Also on this day, August 21st, 1986, a deadly cloud of carbon dioxide escaped from lake meals in Cameroon, killing more than 1,700 people and many animals nearby.