The US has long since destroyed its biological weapons and mostly its chemical ones too. As Nixon said "If someone uses germs on us, we'll nuke 'em." The USSR

The US has long since destroyed its biological weapons and mostly its chemical ones too. As Nixon said "If someone uses germs on us, we'll nuke 'em." The USSR put anthrax warheads on a lot of their ICBMs, mostly because it was cheaper and they weren't as enamored with the idea that it might be possible to win a nuclear war by destroying one's opponent's weapons in a first strike, something bio weapons are useless for.