Derek Fleming, 7, left, looks up at Rasheed Zaimah, right, who is wearing a T-shirt with the likeness of Trayvon Martin, during a rally on Saturday, July 20, 2013, in Nashville, Tenn. The Rev. Al Sharpton's National Action Network organized "Justice for Trayvon" rallies nationwide to press for federal civil rights charges against George Zimmerman, who was found not guilty in the shooting death of unarmed teenager Trayvon Martin.Mark Humphrey/The Associated Press