Civil rights activists and protesters gather on the steps of Los Angeles City Hall as they seek justice for 17-year-old Trayvon Martin in Los Angeles, California April 9, 2012. The February 26 killing of the black teenager by George Zimmerman, a white Hispanic, has triggered protests around the country and calls for Zimmerman's arrest. REUTERS/Jason Redmond (UNITED STATES - Tags: CIVIL UNREST CRIME LAW)