Here's why you should sit back and enjoy your next flight.An Airbus A319 lands at Paro International Airport in Bhutan.Credit: iStockphoto/Getty ImagesKey PointsParo International Airport in Bhutan is one of the world’s most technically demanding, with only about 50 certified pilots navigating its mountainous approach.Veteran Captain Sangay Wangchuk explains that rigorous training, constant simulation, and strict safety protocols make even extre…