Watch Lockup Season 7 Episode 3: It's estimated that more than 600,000 people will be released from America’s prisons this year. But will they be prepared to rejoin society as productive citizens? Each year, our nation spends about $24 billion on its prison system. For the men and women living and working in that system, the daily challenge is simply to survive. MSNBC Investigates what goes on behind the bars, and inside the minds of prisoners and guards. Society also faces a crucial challenge: with more resources than ever invested in America’s prisons, many experts believe the time has come to find out whether the system itself is really working. To search for answers, MSNBC examined this dangerous world from the...