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What is MARCH MADNESS? The College Basketball Tournament Explained

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March Madness is one of the biggest and most dramatic sporting events out there. For three weeks every spring, 68 teams battle it out to become national champs and take home some serious bragging rights. But, how’d the NCAA tournament get started, how do teams get picked to play, and what are the best tips for filling out a bracket? NBC News’ Savannah Sellers breaks down the craziness.