At least 27 hostages, many of them foreign crewmen, reportedly remain in the hands of different Abu Sayyaf factions.
The resort town in the Swiss Alps becomes home to heads of state, captains of industry and others each year during the World Economic Forum.
The spike in air pollution was mainly driven by a cold snap that forced thousands of households to crank up poor quality heaters that burn things like coal and garbage.
Butler training programs have seen more recruits in recent years, and many point to “Downton Abbey,” the drama about British aristocrats, which was avidly watched in China.