Columbus Day has always been a bit ... contentious in the U.S.

In elementary school, most of us learned about Columbus as the man who discovered America. By middle school, we learned that he actually went to South America and the Caribbean. And also there were already people living there.

Then in high school, we might have learned the truth: Columbus had nothing to do with the United States at all ... and also he raped and pillaged lots of indigenous peoples.

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If you want to walk across the country, you need a few things: passion, persistence, and good shoes.

Luckily, 90-year-old Opal Lee has all three.

Lee set out on foot from her home in Fort Worth, Texas, on Aug. 31, 2016, with a mission to walk all the way to Washington D.C. And no, it's not just for exercise, a Guinness record, or some sort of Forest Gump-level brush with boredom.

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Aspen Institute