Violence in Baltimore

In an alley behind the home that had apparently been invaded, tactical police stand ready while Baltimore Police move forward at the 800 block of Linwood during a scene of violence that culminated at an apparent barricade on May 20, 2015 in Baltimore, Md. Children were extracted at the scene and at least one person of interest was taken into custody. (Karl Merton Ferron/Baltimore Sun/Tribune News Service via Getty Images)