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<iframe src='https://smashnotes.com/p/planet-money/e/371-where-dollar-bills-come-from/s/how-is-the-us-currency-protect-from-forgery/embed' width='100%' height='500' style='border: 2px solid rgba(215, 223, 249, 0.89);' frameborder='0'></iframe>


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