We continue our interview with award-winning journalist Shane Bauer about his new book, American Prison, which dives deep into the profit-earning motives of U.S. prisons. Starting with convict labor in colonial-era settlements all the way to present-day mass incarceration, Bauer also recounts his own stint as an undercover prison guard at the privately owned Winn Correctional Center in Louisiana, and the four months he was held in solitary confinement in an Iranian prison as a political prisoner.