He wasn't a threat to any of that.
As I pointed out earlier in the thread, Saddam was boxed in by the northern & southern No-Fly Zones that were set up after the '91-'92 war. He couldn't have done anything if he'd wanted to, since the U.S. and allied military was in Iraq, guarding him every minute. Also, his military was quite weak and had not been rebuilt to any great level of threat since the war.
Thus, there was no legitimate reason whatsoever for the '03 invasion.