The December 2005 Reader's Digest has an interesting article titled "Dead Ahead". It shows why it is important to have a minimum of survival gear on your person, attached or in pockets. The people in the article were in a plane crash in the Great Bear Wilderness, south of Glacier National Park. All the survival gear was destroyed in the crash & fire. I am not going to reprint the whole article here. Can you say "copyright infringement"?