NEW : See how ice affects airplanes » . `` Almost every minute of their flight was in an ice event , '' he said . Tapes indicate crew discussed ice buildup on windshield , wings , NTSB says . NEW : Investigators say the plane was flying at a low altitude when it hit trees and power lines in New Jersey. Officials say all 49 aboard the plane died ; one confirmed death on ground . 9/11 widow , cantor , human rights expert among the dead .
NEW : Tapes indicate crew discussed ice buildup on windshield , wings , NTSB says . NEW : Investigators say the plane was flying at a low altitude when it hit trees and power lines in New Jersey. Officials say all 49 aboard the plane died ; one confirmed death on ground . 9/11 widow , cantor , human rights expert among the dead .