I don't know. We've got three ships sailing around, violating of international maritime law. They had to figure they would be noticed. How much enviro damage can they do? I think smallpox and the chemicals would be toast. I know anthrax spores to be a tad hearty, but months in salt water, so diluted, I don't see how blowing them to smithereens would be a big deal.
Best make sure of their 'location' if near 'good guys'!
Also,......Uh,......Exactly, which WAY the WIND is blowing!
:-(