'To Serve and Protect'- The fatal shooting of Michael Brown in Ferguson, Mo. last summer sparked a series of protests, which quickly spread throughout the country. As the situation came to light, so too did a fierce debate about the increasing militarization of the U.S. police force. Thomas Morton goes to Ferguson at the height of the protests to get an in-depth look at the situation on the ground. He then goes to Urban Shield in Oakland, Cal. and talks to expert Radley Balko to learn how U.S. SWAT teams and police are being trained and how they are getting military-grade equipment to police their communities.'Coming to America' - Over the last two years, there has been an influx of thousands of Central Americans immigrating to the United States, many of whom are fleeing rampant gang violence in El Salvador, Honduras and Guatemala. Suroosh Alvi visits El Salvador to see the conditions that are motivating this mass migration north, and then travels from El Salvador through Mexico to see the perilous journey on top of a network of trains, called 'The Beast,' that many of these immigrants must take to get to the United States.