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Teacher Rebecca Kayes shows off the dollar coins she uses in Quito, Ecuador. Rebecca Kayes hide caption

toggle caption Rebecca Kayes

Planet Money

Dollar Coins In The Wild

We talk to travelers who use frequent-flier-mile credit cards to buy dollar coins and pile up miles. And we hear how the U.S. Mint is cracking down.

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When Canada switched to dollar coins, or "loonies," its simply took the country's dollar notes out of circulation. The GAO says the U.S. needs a similar plan. Ryan Remiorz/AP hide caption

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