Geni seems to be on the right track when it comes to strategic vs tactical. The common military usage is that tactical is intimately committed to the battlefield and the immediate support elements therein, while strategic is to weaken the enemies' capabilities to continue the fight. For example, Attack Helicopters and A-10 Warthogs are in general tactical weapon systems used to attack battlefield targets and opposing Command Posts/Forward Ammo and/or Logistics bases. The B-2/B-52 type assets, now being supplanted by Cruise Missiles, are used as Strategic Weapons (after all, they do fall under the Strategic Air Command) to attack enemy shipping, airfields, plants, bridges and Rear Command/Logistics. Is there some overlap? Of course, but the terms are well understood in the way geni is using them.
Therefore, a mortar is a tactical weapon as it is designed for battlefield use to damage local enemy units within the battle zone. That a tactical weapon can fire a chemical weapon does not by necessity make it a strategic weapon, IMHO. After all, we called the weapons in Germany "Tactical" Nukes, after all.
I find it interesting troll, that you knock down or question the offered definitions of WMD while not attempting to offer one of your own. You will probably argue that it is the responsibility of Zero and geni to develop one, but I would rebut that in the interest reasonable debate a clear definition of what is being argued would be beneficial, no matter who defines it. I await with curiousity for your definition.
Since I put that out there like that, I guess I should offer one of my own. Off the top of my head (and trust me, there is precious little remaining on top of my head), I would define WMD as "Chemical, Biological, or Nuclear (CBW) weapons that are produced and maintained as either a Strategic Deterrent against attack/invasion or as a first-strike Strategic capability against a opposing power and are designed to produce large numbers of casulities and damage to the opposing nation's infrastructure." Given that the rounds found could not be projected over the border (unless right on the border) and were designed to be used with a weapon of limited range and capability, then no, I don't believe we can call these WMD's. Of course, I await your critique of my definition and your own submission.
The bigger question is, are 3 dozen mortar rounds 10 years old with a "blistering agent" (which is designed to incapacitate but not necessarily kill, if I remember my briefings correctly) worth 500 lives, $87B and the potential for increased terrorist recruiting? To me, the answer is no--but I am willing to be swayed once we find all those liters of Sarin gas mentioned by Sec. Powell and more importantly, the means of producing (and MAINTAINING) such weapons.
Time will tell, and the story is not yet written. Give it 20-30 years. We are impatient. Old man History is not.