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Tonight on "Nightly News" Miguel Almaguer boards a chopper for a view of the mudslide from above.

"It's difficult to put into words how much destruction there is," he says.

It could take months to clean up the area -- the mud flow in some areas is 60 feet deep. Homes and cars are buried, and first responders worry that bodies lie beneath the debris and rubble.

Watch "Nightly News with Brian Williams" tonight for more.