The U.S. military has drones, lots of them if the daily reports coming in from Afghanistan and Pakistan are any indication. And a handful of law enforcement groups--though less than would like--have a drone or two at their disposal. But on the domestic, non-security front, drones live a in a regulatory gray area. Hobbyists can use them, but commercial entities are not supposed to employ drones for any kind of monetary gain, says the FAA.
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.