Military surplus equipment is more than just cheap, weird and green. For me, it's a design study in what happens when usability and ruggedness are given priority and production cost is forgotten. Check out the photo gallery for two of the coolest pieces in my collection—the AN-GRR-5 shortwave radio and the TA-1042 digital field telephones—and read on for more on military gear and my favorite sources.
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.