[Thud]

Chemical weapons are possible. Biological weapons aren't. If bin Laden had working nukes or radiological devices (fizzly old xSoviet nukes), he would have used them on Sept. 11.

[riri]

Biological weapons aren't.

I think they are quite the possibility.

[Theresa]

"Chemical weapons are possible"

Two experts on FOX just said that chemical weapons like saren gas are not as likely to cause mass deaths because the sheer volume and bulk required to do serious damage would be hard to transport to the target location. They gave the saren gas attack in Japan as an example.