>> we are working 12 hour shifts. please give us some space around the area as we process this scene. 23 there are any pieces of information or photos from the incident getting those to the two tip lines, they are now in charge of the investigation because of the nature of this investigation. >> this may or may not be part of the investigation. >> and president barack obama has called for increased security around the country as needed. he has ordered that the full resources be brought to bear. >> make no mistake. we will get to the bottom of