With Trayvon Martin parents, Sybrina Fulton, and Tracy Martin, Peter Yarrow, left, and Paul Stookey, right, of the folk trio Peter, Paul and Mary, perform at the 50th Anniversary of the March on Washington. (Photograph: Charles Dharapak/AP)
With Trayvon Martin parents, Sybrina Fulton, and Tracy Martin, Peter Yarrow, left, and Paul Stookey, right, of the folk trio Peter, Paul and Mary, perform at the 50th Anniversary of the March on Washington. (Photograph: Charles Dharapak/AP)