new york, where the helicopter recovered from yesterday s crash in the east river is being held pending an ntsb investigation. right now, mechanical failure is a suspected cause of a deadly plunge. but we re expecting an additional update from investigators at 11:00 a.m. east coast time this morning. one woman unfortunately killed when the sightseeing chopper spun out of control right after takeoff. the british tourist in town to celebrate her 40th birthday. also on board, the woman s parents, a family friend and the pilot, they all survived. one of the witnesses on the scene, fox news medical analyst dr. marc siegel. something that hasn t been reported, brian, is they actually suffer from hypothermia because the water is about 55 to 60 degrees. they re 98.6. they re submerged for about 20 minutes to half-hour. one of them, their temperature is in the low 90 s. they have to get the temperatures slowly up and they have to get the water out of the lungs. they were drowning. they we