Sri Lanka, Jan. 19 -- Snow is falling on Davos again, the way it does every January, turning a Swiss ski town into something between a fortress and a film set. Police checkpoints appear overnight. Temporary barriers cordon off streets. Branded chalets glow along the Promenade like expensive Christmas decorations that forgot to come down. Delegates in dark coats and good shoes move between hotels and the Congress Centre, phones out, documenting their presence under banners that promise "A Spirit of Dialogue." But walk those same streets and you can feel it: the atmosphere is not calm. It is taut, almost electric, because the world outside this Alpine bubble is fracturing in real time, and everyone here knows it. President Trump has just thre...