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Tracy Dyson is a NASA astronaut who sang at the NCAA Championship. Here are five things to know about her.

United statesMarchmadness nationalchampionshippicPatricia roberts harrisTracy dysonJessica chastainMelissa lewisTracy caldwell dysonImage press agency nurphoto shutterstockUniversity of california at davisMission specialistNational anthemAstronaut office operationsImage press agency nurphoto shutterstock tracy dysonService medalLyle wallace award for serviceUs national anthem