Check out this WEBANAR sponsored by Survivalist magizine and hosted by SPT Urban foxhole

Underground Bunkers Now and Then and The top ten things to consider when planning a bunker

Underground protection from weapons has always been the preferred method of survival. As basic as a hand dug foxhole on the battlefield or a deep fortress built into a mountain such as Colorado’s Norad. During WW2 when the cities of Great Britain were being bombed relentlessly by the Germans, families took shelter underground at night time. Deep underground Subways were popular. Some residences made their own shelters. (more)