I see "the sky is falling" again. If Jose got his hands on a Dirty Bomb. It would likely kill fewer people than 9.11. If detonated in a big city, it would slow commerce badly during the clean up. But the world as we know it, would hardly end.
The scariest part of this, for me. Is that Jose (a U.S. citizen) just had his constitutional rights chucked, like they were nothing. He should get a fair trial, then hang him.