The year the iPhone 3G came out, the one with the GPS chip installed and working Google Maps, Todd Humphreys spent a lot of time on the floor of his Bay Area apartment, surrounded by a jumble of wires and his three-year-old son Ramon. Humphreys had just moved with his family across the country to California to co-found a navigation startup based on GPS. (It was later acquired by Apple.) The startup job took up most of his time, but the reason for the wires on the beige carpet, plugged into a spread of laptops, switchboards, and radios, was pure curiosity. Humphreys and a college friend were trying to build something they believed had not yet been created outside of the military. They were building a spoofer.