Wired: "Recent terrorist attacks against the United States and the discovery of a shipment of cell phone guns in the West
have made airport authorities worldwide scrutinize mobile phones.
The improvised cell phone guns -- digital phones that harbor .22 caliber handguns capable of firing four rounds in
succession with a standard telephone keypad -- were apparently not used in the hijackings of American aircrafts on
Sept. 11. But many airports are jacking up security against them anyway."