Take care of your blade and it'll take care of you -- and that's important, when your life depends on it. Here's how to sharpen your knife with just primitive materials.
Survival School: Purify Water With a Plastic Bag
Boiling water is a guaranteed way to purify it, but in a survival situation, you probably won’t have a pot and stove. Here’s how to heat your water with just a plastic bag and a fire.