You don't need radiological material to create a Massive destructive force or explosion. This is old school. New technology makes Nukes inefficent and to costly. It is possible now to create a bigger/size blast than any amount of fisionable material could and do it with little effort and knowledge. The yeild is 1000 times/cubic size than conventional Plutonium and Uranium or X-Factor Element. This new technology is available at any common store and can be purchased by anyone although you need to know how to assemble the device.