I'm gonna type slow...
actually, I don't believe guns kill people. I own 4 myself, but hey who is counting.
The location shouldn't matter if they were made by and controlled by the same people. What does it matter if a terrorist has a nuke and moves it across a boarder? He still has it. The intent is there right?
...and real, real patronizing; here goes;
Saddam and his government were the ones in violation and in trouble. It took a long time for them to be in trouble with the UN and for it to be acceptable in the world community for them to be treated, thought of and talked about as bad folks. If they sent weapons/components/scientists/rolls of aluminum foil or firecrackers to another nation the whole process has to start over.
Further, if Usama picks up a nuke in Mosul and moves to Damascus with it, there may be a bit more of a case for action. Saddam, as you may recall, stayed in Iraq. He is no longer a threat to anyone.
If it raised such a ruckus in the US on our political left to go fight when all the i's have been dotted and t's crossed, how in the heck are we supposed to just go after a truck load of parts and manuals in another nation?