How Vulnerable Are America’s Power Grids?

America’s power grids power our lives, but 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?

via How Vulnerable Are America’s Power Grids?