Dad of co-pilot killed in Palm Beach jet crash says losing daughter "like having the heart torn from my chest"

The father of the 20-year-old co-pilot who died along with eight others when their Learjet crashed in Florida said Friday he has listened to his daughter's heartbreaking final radio transmissions "many times" since the crash.Allan Filgueiras, himself a pilot, was searching for answers as to why the plane plunged from the sky on Sunday but what he found was immense pride in how his daughter, Nathalia Gadelha Filgueiras, handled the crisis."I did listen to that many times trying to find a clue. In my head. How'd that happen? And wow, she's tough," Allan Filgueiras said at a news conference Friday, frequently holding back tears.Nathalia Filgueiras was co-piloting the aircraft on a flight from Austin, Texas, to the Bahamas when it nosedived into the ground in Greenacres and burst into a fireball. Investigators reported that parts of the aircraft appear to have broken off prior to the crash.In her final conversation with air traffic control, she can be heard calmly reporting ice buildup o