Three years ago, Ferguson, Missouri, exploded into national headlines when an unarmed black teenager, Michael Brown, was shot and killed by the police. Protests erupted in many cities, including Atlanta. Now, Charlottesville is the latest example of the nation’s heightened racial tensions and growing white supremacy groups. We talked with Pulitzer Prize-winning journalist Wesley Lowery , who covers race and justice for The Washington Post. He's author of the book, “ They Can’t Kill Us All: