 analyzing, even with a spectrum analyzer, you could see where the signals are coming from and track it down that way. So my concern about an EMP attack, detonation of a nuke, for example, could be done from a submarine in the ocean. We'd never know who did it. True. Absolutely. Even by a drone flying by. And how do you retaliate when you don't know who to retaliate against? That's the problem.