[trebb]

Low Grade doesn't mean it's totally impotent - it just isn't suitable for making nukes that go kapow. Drink an ounce of water that is 25% cyanide and you will be just as dead as if it were pure cyanide.

[mvpel]

If someone was going to make a dirty bomb, we'd be blessed if they used uranium. If they used cesium, found as a radiation source in medical and industrial applications, it would be an entirely different story.