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  These are the events I chose from the United States perspective from the last 140 years.
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  In 1908 Henry Ford created the Model-T and the assembly line in order to generate a large number of cars to sell for prices lower than ever before.
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  A deadly fire broke out and killed 146 factory workers.
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  This was the treaty that ended WW1 but also was one of the main causes for WW2.
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  This finally gave women the right to vote.
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  Two-thirds of the Jews in Europe were killed in this awful event in Hitler's atempt to create the master race.
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  These were the first and only atomic bombs dropped. They were dropped on the 6th and 9th.
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  This case overtunred Plessey v. Ferguson, seperate but eaqul.
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  President Nixon spent a week in China trying to build relations with them.
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  After the US pulled out in 1973, North Vietnam attacked and the South couldn't do much to fight back so the country became united under communism.
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  Around 300-500 Iranian students took 66 US citizens and diplomats hostage for 444 days.
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  The USSR broke into 15 seperate countries and was no longer communist.
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  Four planes were hijakced and crashed into the two towers of the World Trade Center, the Pentagon and Shanksville, PA. This led to the War on Terrorism.