Types of Shelter
Different kinds of bomb shelters are configured to protect against different kinds of attack and strengths of hostile explosives. For example, an Air-raid shelter is a structure built to protect against bomber planes dropping bombs over a large area. These were commonly seen during World War II. A fallout shelter is a shelter designed specifically for a nuclear war, with thick walls made from materials intended to block the radiation from fallout resulting from a nuclear explosion. Many such shelters were constructed as civil defense measures during the Cold War. A blast shelter protects against more conventional bomb blasts. Its main purpose is to protect from shock waves and overpressure. While these forms of bomb shelters are equally amenable to civilian and military use, a bunker is more commonly associated with military use. A bunker may be hastily assembled as part of an ongoing military advance, or to hold a line.
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