I think that if he had them, they'd have used them. Then if they DID have them, they would never come out now and say they did have them, they would have lured the american forces into a town (airbase, whatever) and left the nuke behind with a plan to detonate it once the town was inhabited by americans.
Either way, this sounds like pure BS.
As long as he says so it sounds like a damned good reason to croak the SOB.