Either Solar flares (which occur about every 150 years) or a deliberate nuclear electromagnetic pulse set off over the U.S. could destroy our civilization. And both the North Koreans and the Iranians have tested such EMP weapons. As Hal Lindsey details in the second story of this broadcast.
Judge Jeanine Pirro on her weekly program last night devoted the entire hour to this subject, and congressional and homeland security proposals to protect the U.S. from such a destruction of our electric power grid, by either solar flares or EMP weapons.
More recent update by Wall Street Journal reporter, and U.S. Representatives disscuss their efforts for legislation to protect U.S. power grid. http://www.youtube.com/watch?v=LmSzyy0Uzw8