Gingrich is ready to ring the alarm bells about the electromagnetic pulse phenomenon. Under this theory, if a nuclear weapon were detonated in outer space high above the American continent, it would set off a huge and crippling shockwave of electricity. This would destroy electrical circuits from coast to coast knocking out every functioning piece of technology that we have, throwing the US Into the dark ages. Scientists call this "far fetched" and the pentagon call "pretty theoretical." Is Gingrich a doomsdayer?