While various cyber-attacks against US government and business targets are numerous and well-documented, America's own offensive capabilities in this area have remained mostly out of view. However, in his recent testimony before Congress, NSA chief Lt. General Keith Alexander reversed that history a bit, and confirmed that the US has, and is, engaged in offensive cyber-warfare. Alexander also explicated how cyber-combat factors into the general doctrine of legality of war.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.