Re: Nuclear weapons
A suitcase nuke supposedly has a tritium load in addition to the fissiles to make the detonation work right. Tritium's short half-life (about 12 years if I remember right) means the bomb has an actual shelf-life, unless reloaded. If they swiped a bomb a long time ago, even assuming it was "fresh" when they got it, the terrorists have a slowly decaying dud on their hands. I don't know how much tritium is needed to still get it to work right.