Currently, Air Koryo is the only 1 star airline on Skytrax. I want to review their flight to see are they really the worst airline in the world? Business Class Review of Air Koryo Tu-204 from Beijing to Pyongyang For full report please see: http://samchui.com/2016/09/30/review-air-koryo-really-1-star-business-class-beijing-pyongyang/