On behalf of the Board and staff of the NTSB, I wish to offer our deepest sympathies to the families and friends of those who lost their lives onboard EgyptAir flight 990. For over two years, the NTSB worked diligently to uncover the facts of this tragedy and each potential cause of the accident was thoroughly analyzed. Throughout each step of the work, the NTSB followed its well-established, strict investigative process. The report's analysis and conclusions are firmly supported by the physical evidence and recorded data.