Nepal Flash Floods Update: Rescuers Race for 2,500 Missing as Fresh Flood Threats Loom (Videos)

Catastrophic flash floods have devastated communities along the rugged border between Nepal and Tibet. Authorities confirm nearly 600 people have died. At the same time, emergency crews are searching for more than 2,500 missing people. A massive glacier collapse triggered the disaster earlier this week. The collapse sent a destructive wall of mud, rock, and water tearing down mountain valleys. It…