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Katie Couric sets out across America to meet with leading scientists, surgeons and experts to answer questions about gender identity. (National Geographic)
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Photo © National Geographic Channel
![Gender Revolution: A Journey With Katie Couric - Photos](http://image.pmgstatic.com/cache/resized/w663/files/images/film/photos/161/459/161459400_227e43.jpg)
Katie Couric sets out across America to meet with leading scientists, surgeons and experts to answer questions about gender identity. (National Geographic)
Photo © National Geographic Channel