A tragic collision between an American Airlines plane and a US Army Black Hawk helicopter has left all 67 onboard presumed dead. The flight carried 64 people, while the helicopter had three military personnel. Investigators are analyzing black box data, revealing the plane was at 325ft and the helicopter at 200ft, with experts puzzled by a 100ft discrepancy. The helicopter’s black box, submerged in the Potomac River, is being recovered. NTSB officials are working to determine the cause, while President Trump blamed the crash on the helicopter flying too high.