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  The horse and buggy were the primary modes of transportation at this time.
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  The first transcontinental railroad was completed in 1869. This allowed Americans to travel across the country with greater ease.
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  The flight of Kitty Hawk ushered in the age of flight.
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  The Model-T was the first popular car in America. This began the golden age of automobile manufacturing in America.
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  Neil Armstrong first landed on the moon on July 20th 1969. This was the height of the American Space Age.