 Before World War II, a German general had reports that the English, this was in 1938, I guess, before the war started, that the English were building these tall towers all along the English channels with crossbars on them, aiming toward Europe. And he figured, since we're working on radar in secret, that's what the English must be doing. Now, we need to know what frequencies they're using so we can jam the radar when we go to attack.