Learjet may have broken apart before Florida deadly crash, NTSB says

The National Transportation Safety Board is investigating what caused a deadly Learjet 60 crash in Florida near Palm Springs that killed all nine people aboard. The NTSB says early evidence indicates the aircraft may have begun breaking apart before it hit the ground. Deadly Florida Learjet crashNTSB Member Tom Chapman and Investigator-in-Charge Timothy Monville briefed media Monday on the investigation and the agency’s planned work at the crash scene in the coming days.PREVIOUS: Florida plane crash: 9 dead after Learjet crashes in Palm Beach County, officials sayAbout 20 NTSB investigators arrived Sunday evening, with additional staff arriving Monday. The Federal Aviation Administration is assisting with the investigation."On behalf of all of us at NTSB, I want to express our profound condolences to the family and friends of those lost in this tragedy. We are truly sorry for your loss," Chapman said.What happened before the crash?NTSB officials said the Learjet departed Austin-Bergstr