Pulitzer Prize-winning author Tracy Kidder, author of "Rough Sleepers," talks about Harvard educated doctor Jim O'Connell and his work with the homeless population of Boston over the past 40 years. Tracy Kidder followed Dr. O'Connell and his colleagues from the Boston Health Care for the Homeless Program for five years to get an understanding of their work and an insight into the homelessness crisis in America.    
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