A National Airlines B747-400 freighter that crashed seconds after takeoff from Bagram, Afghanistan, in April 2013, was likely caused by inadequate restraint of large military vehicles being carried onboard which broke loose and went through a bulkhead disabling two hydraulic systems and making the aircraft uncontrollable, according to a National Transportation Safety Board (NTSB) investigation. The crash killed seven crew members at the start of the flight to Dubai. The aircraft was … [Read more...] about National B747F crash from shifting cargo: NTSB