What's next for zero-tolerance, MIT's connections to slavery, Spinal Tap

Thousands of immigrant children already separated from their families are still in limbo. Plus, we look at the effects of government policies around the globe meant to deter migrants and asylum-seekers. And a young Somali man who won the visa lottery to come to the US years ago ended up settling in Maine. He has a new memoir about his escape from Mogadishu and his changing impressions of his new home.