RussiacastasecondvetoinasmanydaysattheUnitedNationssecuritycouncilonFridaytoblocktherenewalofaninvestigationtoidentifythosebehindchemicalweaponsattacksinSyria.A
TheUnitedNationsSecurityCouncilwillvoteTuesdayonwhethertoextendaninternationalinvestigationofchemicalweaponsattacksinSyria--ameasurethatcouldbevetoedbyRussia.Th