My arrival in South Korea on Feb. 10 for the Pyeongchang Winter Olympic opening ceremonies was jarring.I had just come from Washington, where the perception of North Korea as both a serious threat to U.S. security and as a barbarous dictatorship is deepening.Transiting from Incheon airport to the sleek KTX bullet train, en route to Pyeongchang -- itself little more than 80 kilometers from the demilitarized zone, I found South Korean travelers clustered around TV sets, raptly watching a North Korean symphony concert, and absorbing news that Kim Jong Un's younger sister had also just arrived …READ FULL ARTICLE