Two separate pieces of news:
With the current upheaval in Pakistan, the fate of Pakistan’s nuclear weapons is in the news (msnbc.msn.com). The fear is that forces sympathetic to al Qaeda could accomplish a “nuclear coup.” Pakistan is believed to have 30 to 45 nuclear weapons.
A dirty bomb, aka radiological dispersal device (RDD), could be used in homegrown, domestic terrorism. In Urbandale, Iowa, a man is being investigated (kcci.com).
Survive A Nuke Attack 