But why chlorine?????

I just had MSNBC on while I was cooking some breakfast. The anchordunce was talking with a "military analyst" about chlorine bombs recently used in Iraq. She said, and this is a very close paraphrase, "I mean, why chlorine? What makes chlorine so deadly when it's the same chemical we use in our swimming pools and cleaning products and bleach?"

Other questions she might want to ask the analyst: "Why are bullets so deadly? I mean, women need to take daily iron supplements." "If E. coli is in everyone's gut, why isn't everyone sick?" "How can electrodes on someone's genitals hurt? I mean, it's the same electricity we use to watch television with every day!"