>Some doorknob has dropped some ricin in Vegas. There is no antidote to ricin. If it gets in your system, you shall die. As little as 500 micrograms, or about the size of the head of a pin, can kill a human. I read that this is not considered a terrorist event. We shall see.

Might be, but you can make it yourself pretty easily from castor beans. Highly illegal of course. Could just be some digruntled husband, but I thought the same thing when I read it.