Speaking as an ex Pershing and Titan launch officer (I was in both the Army and Air Force at different times.) I'm not really worried about a nuke going off due to all the various correct comments about how hard it is to maintain them and how difficult it would be to move them due to the size.
However, I am very worried about someone taking the radioactive material out of them, packing it around some C-4, getting on top of a skyscraper and setting it off.
I'll throw in the standard, "ding, ding, we have a winner". All AQ has to do is put a little radioactive waste and C4 together and their useful idiots in the MSM do their terrorizing for them.
The original post about UBL being a mastermind is ludicrous. If he had a brain at all, he would have had a follow on strategy after 9/11. Instead, he sat back while we destroyed his puppet regime and killed untold thousands of his supporters.
Wouldn't they rather get the dirtier material out of a nuclear reactor, after it's cooked awhile and created all kinds of interesting and hot isotopes?