Five out of the six major world marathons now allow non-binary runners to compete without having to register in either the men's or women's divisions.
NBC News' Joe Fryer speaks with Nick Dill about what that means for them.
Non-binary category allows marathon runners to compete 'as authentic self'
Nick Dill is a veteran marathon runner, but this weekend's race in New York will be the first time they participate in the..
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