How Vulnerable Are America's Power Grids?

America's electricity grid powers our lives, but, as The Epoch Times' Chris Chappell points out, because it was never built with attacks in mind, it has plenty of vulnerabilities.

Everything from malware cyber-attacks, to geomagnetic storms, to nuclear detonations in the atmosphere above the US, even sophisticated electronic weapons from Russia and China - all these threaten to shut down our grid and sow chaos.

So what, if anything, is being done to counter this threat?