A russin company has developed a small device that can jam the global positioning system (gps). The device is portable and can take out both military and civilian gps-signals.

Many systems are dependent on GPS nowdays. Things like smart-bombs (used in Afghanistan) rely on gps, ships, airports, lots of stuff need gps to function.

Who knows what would happen if someone turned one of these gadgets on in an airport on a foggy evening? Maybe the planes would loose direction and crash? Scary!

And for military operations, the smart bombs wouldn't be very effective if they couldn't hit their targets. Now they can hit a spot +- 10 meters. Warfare would increase in cost and more lives would be lost. I bet the dictators around the world have bought a jammer or two by now. Saddam has probably turned his gadgets on already...

Links:
http://www.ac11.org/gps1.htm
http://www.info-sec.com/denial/denial_012298a.html-ssi