So, that will go on and on, and it sort of sounds like a wave, and it is different from the tone that would be used or that currently is used to warn people about, for example, a tsunami, and that is what emergency planners want to impart to the public, that when you hear this sound, there are different things you want to be doing as opposed to, let's say, if there's a tsunami. let's talk about that. what should people do if they hear the sound and there is actually a nuclear attack? >> okay. let me emphasize one thing is that this is not in place yet. we're working on this. we have to make su...