Hydrogen fuel cell vehicles aren't just for eco-conscious civilian drivers. Chevy has unveiled the Colorado ZH2, an experimental truck designed to test the feasibility of fuel cells in the military. Its powerplant is much quieter and cooler-running than a conventional gas motor, making it ideal for special ops where conventional trucks would blow your cover. However, its real specialty doesn't involve driving at all -- you can use the modular cell to power devices outside the truck with up to 25kW of continuous electricity. A squad could run equipment while camped out in mid-mission, for example.