[kegler4]

You are exactly right.

If there are huge piles of WMDs hidden somewhere, there are numerous people out there who know about them and at least one of those people would find it worth the reward (either money or a free pass out of prison) to tell. It hasn't happened because the WMD stockpiles aren't there, pure and simple. Does anybody really believe these scumbags are so honorable and loyal that they'll rot in prison or rat holes rather than give it up?

[plain talk]

there are numerous people out there who know about them

They could be dead laying in one of those mass graves.

[wizardoz]

If there are huge piles of WMDs hidden somewhere,

Nobody ever said they were huge piles. One of the advantages of bio-chem weapons is that a little goes a long way. The entire store is said to be small enough to hide in a semi-truck... but enough to cause the deaths of hundreds of thousands.