the Purpose of a bomb shelter is to shield you from gamma radiation in the aftermath of a nuclear war.

Gamma radiation will fall down and settle on your roof, and emit radiation right through your walls and down into your tissues. If you have 3 feet of earth, however, between you are the fallout, it cannot reach you. If you have 1 and a half feet of earth protecting you, you will recieve twice as much radation as if you had 3 feet of earth shielding you. It's basic mathematics in some regards, you don't need to be a nuclear physists to understand how to survive a nuclear war.

Gamma radiation does not last forever, it dissipates in about two weeks.

If the Jews and Obama start a nuclear war, you will HAVE to report to a public fallout shelter. If you don't you will most likely die. Public fallout shelters in the cities will be full of negros and very Katrina like, only for alot longer period in much, much more cramped spaces. Any white girls in bomb shelters will probably become impregnated by blacks during this time period.

[ame="http://www.youtube.com/watch?v=Bz3t4LcXwtE"]YouTube - 1950's Cold War Propaganda - Fallout shelter[/ame]

[ame="http://www.youtube.com/watch?v=-_Zgyp4HgNU"]YouTube - Living in a Fallout Shelter Pt.1[/ame]

[ame="http://www.youtube.com/watch?v=y0tP9-x-Wo4&feature=related"]YouTube - Living in a Fallout Shelter Pt.2[/ame]

Switzerland built an extensive network of fallout shelters (mainly through extra hardening of government buildings such as schools) of a scale to protect and feed the entire population for two years after a nuclear attack. This nation has the highest ratio of shelter space to national population of any country. All these shelters are capable of withstanding nuclear fallout and biological or chemical (NBC) attacks but the blast-proof requirement varies depending on the size of the building. The largest buildings usually have dedicated shelters tunneled into solid rock. Similar projects have been undertaken in Finland, which requires all buildings with area over 600 m² to have an NBC shelter, and Norway, which requires all buildings with an area over 1000 m² to have a shelter[1].
The former Soviet Union and other Eastern Bloc countries often designed their underground mass-transit and subway tunnels to serve as bomb and fallout shelters in the event of an attack.
Interest in fallout shelters has largely dropped, as the perceived threat of global nuclear war reduced after the end of the Cold War. In Switzerland, most residential shelters are no longer stocked with the food and water required for prolonged habitation and a large number have been converted by the owners to other uses (e.g. wine cellars, ski rooms, gyms). However, a renewed interest has been seen since 2001. These shelters also provide a safe haven from natural disasters such as tornadoes and hurricanes, although Switzerland is rarely subject to such natural phenomena.