Dramatic footage reveals just how pilots handle some of the world's scariest airport landings and take-offs.Paro, BhutanSurrounded by the towering peaks of the Himalayas, Paro is one of the world’s most challenging airports for pilots. Indeed, only eight pilots in the world are currently certified to land here. Located in a deep valley, landing involves negotiating a series of mountains, rapid descents and then a steep bank to the left immediately before the much-longed for landing.