Rev Jesse Jackson speaks to the crowd at the Sanford Police station during a rally for slain Florida teenager Trayvon Martin on Saturday, March 31, 2012 in Sanford, Fla. Protesters carried signs, chanted Justice for Trayvon, and clutched the hands of their children while they walked from Crooms Academy of Information Technology, the county s first high school for black students, to the Sanford Police Department. The march was organized by the NAACP was one of several taking place over the weekend. Martin was shot to death by 28-year-old George Zimmerman on Feb. 26 as he walked from back from a convenience store to his father s fianc e s home in a gated community outside Orlando. (AP Photo/Julie Fletcher)