 and we should say at this hour we have no reason to believe there is an ongoing threat here in the united states but we also don't know much about who the shooter was well i'll just say margaret we we don't know that there are other threats associated with this incident every official i have spoken to has said that there are threats associated with retaliatory action associated with this event and so they are deeply concerned about the tense moment this presents for this country and potential retaliatory or copycat violence