Flying spiders. Nuff said.
To elaborate, think about it for a moment; We are in diplomatic talks with the Koreans, with the Iranians, over telephone conference, and then suddenly, out of nowhere, a bunch of flying spiders start landing on the capital building. And not just any spiders; giant spiders. One's that can only live for a few days at 20% oxygen, which is why they are so big in the first place. We authorize genetic engineering in the U.S., we get them to start engineering the most terrifying things we can think of, but something that would pollute the environment.
...?
Profit.
We rain down hot hell on them until they surrender. Yeah, we can't use nukes, or nerve gas, but we can make their lives living hells into they cave in to our demands. We just need to make it so they don't stick around for too long, but long enough to be annoying. To build webs everywhere. And I'm thinking have them work as teams, too, so they can build giant super webs, like this, or even this. [1]
Also, giant flying scorpion's, Chimeras, and any other concoctions you can think of.
Iran is really religious and superstitious, so I'm thinking, something along the 10 plagues. Turn their water red with bacteria, drop a bunch of frogs with parachutes out the back of a plane, spray some herbice to have a famine. Do everything but kill a bunch of children, then threatan too. Watch them sign the nuclear treaty within a month. Idk, it sells itself. Win-win.
Allsz I can think of is win. What do you think, Invicta?