tional explosive is packed behind the second subcritical mass.
             When the fuse is triggered, a conventional explosion causes the second
             subcritical mass to be propelled at a high velocity into the first
             subcritical mass. The resulting combination causes the two
             subcritical masses to become a supercritical mass. When this
             supercritical mass is obtained, a rapid self-sustained chain reaction
             is caused (World Book, 1990). This type of atomic bomb was used on
             Hiroshima, and given the nickname "Little Boy" after Franklin D.
             The second type of atomic bomb is an implosion bomb. In this
             type a subcritical mass, which is in the shape of a ball, is placed in
             the center of the weapon. This subcritical mass is surrounded in a
             spherical arrangement of conventional explosives. When the fuse is
             triggered all of the conventional explosives explode at the same time.
             This causes the subcritical mass to be compressed into a smaller
             volume, thus creating a supercritical mass to be formed. After this
             supercritical mass is obtained, a self-sustained chain reaction takes
             place and causes the atomic explosion (World Book, 1990). This
             type of stomic bomb was used on Nagasaki, and given the nickname "Fat
             Man" after Winston Churchill (Outlaw Labs).
             The blast from an atomic bomb's explosion will last for only
             one-half to one second, but in this amount of time a great deal of
             damage is done (Physicians and Scientists on Nuclear War, 1981). A
             fireball is created by the blast, which consists mainly of dust and
             gasses. The dust produced in this fireball has no substantial effect
             on humans or their environment. However, as the gasses expand a blast
             wave is produced. As this blast wave moves, it creates static
             overpressure. This static overpressure then in turn creates dynamic
             pressure. The static overpressure has the power to crush build...