Exactly a month after Trayvon Martin's death, 3,000 people in Sanford, Fla., marched on the town's civic center and demanded justice for the slain teenager and punishment for the man who shot him. At the end of the hour-long march, Martin's parents Sybrina Fulton and Tracy Martin spoke of their grief for their son and their anger that George Zimmerman, the neighborhood-watch volunteer who had shot him, was still a free man. The hall filled with loud shouts and amens and fierce cries for justice that drowned out even the family's and lawyers' speeches.
The march was the climax of...