Mary Ann Vecchio screams as she kneels over Jeffrey Miller's body during an anti-war demonstration in 1970 at Kent State University. Student photographer John Filo captured the Pulitzer Prize-winning image after Ohio National Guardsmen fired into the crowd of protesters, killing four students and wounding nine others. A widely published version of the image was manipulated by an anonymous editor to remove the fence post above Vecchio's head, sparking a major controversy.