|The following is based on Van Buren and has not been confirmed by canon sources.|
Nuclear Nellie is a Howitzer looking cannon, this gun was originally designed to fire a ten megaton nuclear warhead shell, cannon style, to a target some thirty miles away. In its current state, Willem Clark changed Nuclear Nellie's design a bit to fire a dirty shell thirty miles away. The dirty shell uses the few, but remaining remnants of uranium and other radioactive material to distribute over a two city block area. The resulting contamination, Willem hopes, will cause the occupants of the newly radioactive zone to disperse and flee. Willem intends to one day use this device against an enemy by mounting it upon a rail car and taking it within thirty miles of its intended target, once he finds one that is a suitable threat. Until then, Nuclear Nellie waits. However, since the heavy lift cable is broken, there is no way to bring the gun from its underground lair.