Article Photos: Immigration debate gives life to annual rallies 32/36

Police face off against demonstrators during a May Day protest in Seattle Wednesday, May 1, 2013. Police used "flash bangs" and pepper spray against some protesters who pelted them with rocks and bottles late Wednesday, as violence erupted during May Day in Seattle. Several dozen protesters, many using bandanas to cover their faces, began clashing with police in downtown Seattle hours after a peaceful immigrant-rights march ended. (AP Photo/Jordan Stead, seattlepi.com)