A 64-year-old man remained missing Thursday after a huge mass of rock and ice from a glacier crashed down a Swiss mountainside the day before. The landslide sent plumes of dust skyward and coated with mud nearly all of an Alpine village that authorities had evacuated earlier this month as a precaution. State Councilor Stéphane Ganzer told Radio Télévision Suisse that 90% of the village was destroyed.