The first blast, a 5.3 kiloton bomb, took place in 1964 at the bottom of a 2,710-foot shaft 28 miles southwest of Hattiesburg and four miles northeast of Baxterville.

By concentrating on the light elements generally and by pushing the megaton instead of the kiloton bomb they could be the leading nuclear power in eight or ten years if their hydrogen research pays off.

Nuclear testing began at the Nevada Proving Ground in 1951 with a 1 kiloton bomb dropped on Frenchman Flat.

A series of 50 kiloton bombs would be dropped into the cavern, and exploded to heat the water and create steam.

Way back in the fifties of last century there were aircraft equipped with as many as five kiloton nuclear bombs, under the control of a single pilot.

Chas datavised the activation code into the kiloton bomb strapped in its harness at his side.

In a 21 kiloton bomb, for example, about a gram of light and heat is created.

First, he envisioned a nightmarish, but not inconceivable, scenario-a "limited nuclear exchange," or the detonation of 50 fifteen kiloton bombs.

A 20 kiloton bomb killed 1 million people and many thousands would have been blinded while more would suffer cancer, leukaemia and various other diseases caused by this gross destruction.

In 2008 it became publicly known that the shelter would have just about withstood the detonation of a 20 kiloton bomb, comparable to the destructive force of the Hiroshima bomb.