Everyone should always be prepared for a cyber attack that could cripple the power grid. Edit 2: I am not saying that an Iranian attack is at all likely, it's just sensible to be prepared for anything. Plan with your family what to do should cell phones be inoperable, traffic lights go out (assume total gridlock, and cars become useless), obviously no internet, etc. Worst case scenario is that you've wasted a few minutes of your time, and an attack never comes. Anyway, if I were considering a cyber attack against the U.S., I'd launch any major attack smack dab in the middle of the American workday, like 12:00 CDT/CST. But like the Forbes article says, it would take time to prepare on-the-ground assets. Would love to hear your 2 cents, 'bl00. Edit: is there any sort of widely-used mesh network app for smartphones?