OAKLAND, CA - DECEMBER 15: Protestors link arms and block the street in front of the Oakland police department headquarters during a demonstration over recent grand jury decisions in police-involved deaths on December 15, 2014 in Oakland, California. Over 200 hundred protestors blocked entrances to the Oakland police department and adjacent streets during a demonstration against recent grand jury decisions in New York and Missouri to not charge white police officers with the deaths of black men. Dozens were arrested. (Photo by Justin Sullivan/Getty Images)
