First of 2 parts AN unexplained power blackout shut down the nation's civil aviation system for at least five hours on New Year's Day, a Sunday, causing the cancellation of some 400 international and domestic commercial flights and stranding some 60,000 passengers of various nationalities in the country. They called it a "glitch," which means a minor dysfunction in the Air Traffic Management Center (ATMC) that controls the country's airspace outside of individual airports' control zones. But no thorough investigation has been conducted to discount the possibility of sabotage or cyber attack. Meanwhile, a much bigger glitch — a glitch...