A desperate search is underway for more than 1,500 people still missing after catastrophic flooding devastates Nepal and Tibet. At least 547 people are dead, w

A desperate search is underway for more than 1,500 people still missing after catastrophic flooding devastates Nepal and Tibet. At least 547 people are dead, with about 90 Americans among those still unaccounted for. The disaster was reportedly triggered by a glacier collapse that sent a wall of w…