Campsites' opening teetering amid threat of beetle-damaged trees

When a beetle-killed tree falls in the woods and nobody is there, federal foresters barely flinch.

But when millions fall — an estimated 100,000 each day — foresters begin shutting down campgrounds.

"It's a dangerous situation," said Mary Ann Chambers, spokeswoman for the U.S. Forest Service's Bark Beetle Incident Management Organization at regional headquarters west of Denver.