A 14-year old boy, a Polish student, hacked into the tram system which enabled him to change track points in Lodz, Poland.  Four trams were derailed. Twelve people were injured when a train derailed.  The boy built an infrared device that looked like a TV remote control that could control all the juntions on the line.  No deaths occurred.  The boy will face a special juvenile court on charges of endangering public safety.

Four trams were derailed. Twelve people were injured when a train derailed.