confronted a man in the fourth floor corridor and shot him at point blank range. >> law enforcement officials say he bought the shotgun as recently as a week ago in nearby virginia. president obama was briefed about the attack and his remarks addressing the five year anniversary of the financial crisis quickly took a somber turn. >> we poll gapoll gaze for that. those killed range from n. age from 46 to 73. the victims were all civilians and contractor, not active duty military. a witness says arthur daniel spotted a gunman running down the hallway inside building 197. and this is a huge complex.