For all practical purposes there are no nuclear bomb shelters in the US. However there are fallout shelters, thousands of them. But they won't help anyone if a bomb detonates over their city. They will only help those in untouched cities survive a few weeks to months until fallout decays to "safe" levels. However few will know how to find one, most of the signs were removed long ago and many had their food and water removed.
The Cold War and nuclear arms races in the late forties through the eighties was the impetus of Americans building bomb shelters. They were convinced Russia would bomb America and they could have if Kennedy had not stopped Fidel Castro and the Russians from sending over their nuclear missiles located ninety miles from the US. Most of the bomb shelters were a joke. They never could have protected the people from the radiation in the air or from the bomb explosion.
one no, many yes
they have nuclear missiles. and they have many powerful explosives. and yes massive bombs.
In the US, bomb shelters were a boom in business in the late 1950's and early 1960's; the Eisenhower/Kennedy years. They were hardly spoken of after the mid 1960's. By the late 1960's people often spoke fun of those people (made fun of them) that built those bomb shelters. ALthough no doubt some may still exist, bomb shelters in the US are a thing of the past which ended in the 1960's.
1945
To end WWII.
US
no it did ont
US
1945
Doubtful.
US, who else?