From left, Rev. Jesse Jackson, Rev. Al Sharpton, and Benjamin Jealous, President of the NAACP lead the march 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 and 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 fiancée's home in a gated community outside Orlando. (AP Photo/Julie Fletcher)
March 31, 2012 9:51:44 PM PDT
SANFORD, Fla. - March 29, 2012 --
Thousands joined a march Saturday through the Florida town where 17-year-old Trayvon Martin was shot and killed by a neighborhood watch volunteer, vowing to continue protesting until an arrest is made.