The US imprisons more people than China, Iran or Russia — with blacks serving more time, more often than anyone else. The death of unarmed black Americans at the hands of police officers has renewed attention to racial inequality in the criminal justice system. In Wisconsin, African Americans are 6% of the population and 37% of the prisoners -- but the DA in Milwaukee County is trying to change that. It turns out that prosecutors have more power than cops in determining who serves time and who doesn't. We hear about the role of race in the "crackdown on crime," which may become an issue in next year's presidential campaign.