One can imagine two very different futures. In one, these stories appear on the front pages of The New York Times and The Wall Street Journal. The Food and Drug Administration suspends cell phone sales, and the Federal Communications Commission shuts down cell towers. Cities stop building Wi-Fi networks. Internet cafes dismantle antennas and install cables. Public service announcements tell people to put wires back on their home phones and computers. Wireless technology takes a place in history beside other mistakes like lead water pipes, asbestos insulation, thalidomide and DDT.