Ashleigh Johnson is one of the best water polo goalkeepers in the world. NPR's Juana Summers talks to her about her barrier-breaking role in the sport and her expectations for her third Olympic games.

Who do you most admire? A former teacher, a world leader, a neighbor, your boss? As adults, we tend to give little thought to the idea of having a “role model,” as we regard this to be a quality that ...