a deadly news helicopter crash in seattle is raising concerns over safety. witnesses say they heard unusual noises from the helicopter shortly before it crashed yesterday killing two on board and injuring a third on the ground. that victim's condition has been upgraded from critical to serious. the ntsb not ruling anything out just yet. >> right now our primary goal is to identify witnesses, identify surveillance video that may be in the area, then also get the wreckage picked up, cleaned up from this location and moved to a hangar facility in auburn where a little more controlled where these folks can work on doing their job. >> investigators say it could take months to determine the cause of the crash. we'll keep you updated. also a gun threat without the gun. armed police responding to a