Radioactive pieces of industrial metal that could be used in terrorist attacks are sometimes secured with little more than ordinary padlocks, according to congressional auditors, who also called the procedures for background checks of employers handling the materials ineffective.

New rules will add restrictions for the use, storage and domestic transport of nuclear materials that terrorists could potentially use to build a dirty bomb.

There is a dirty bomb music video. There are at least three dirty bomb movies. But, when it comes to reality, such weapons are fairly easy to assemble and activate.