What was Ernest Hemingway up to in his mid-twenties? And how did those years, and his time in Chicago influence his writing? Liesl Olson, Director of the Scholl Center for American History and Culture at the Newberry Library in Chicago joins Niala to answer these questions. Olson is giving a talk on Sunday as part of a Hemingway birthday celebration at the Oak Park Hemingway Museum. (Flickr/Vanessa Danison)