The U.S. is very close to improving power grid security by mandating the use of “retro” (analog, manual) technologies on U.S. power grids as a defensive measure against foreign cyber-attacks that could bring down power distribution as a result. Catalin Cimpanu writes in ZDNet that the idea is to use “retro” technology to isolate the grid’s most important control systems, to limit the reach of a catastrophic outage.