Quimani Cobb, 11, holds a sign while taking part in the Seattle Unite 1000 Hoodies rally for Trayvon Martin at Westlake Park in Seattle, Washington, March 28, 2012. Neighborhood watch volunteer George Zimmerman shot and killed an unarmed 17-year-old Trayvon Martin on February 26, 2012 in Sanford, Florida. REUTERS/Marcus Donner (UNITED STATES - Tags: CRIME LAW SOCIETY)