Defense Dept. wants your help in imagining the worst

Uncle Sam wants your brain power, technical expertise and imagination to help defend the U.S. No enlistment required.
The Department of Defense says it needs to understand how everyday objects and available technologies can be used by terrorists.
The range of technologies is so vast that the military's main scientific agency, the Defense Advanced Research Projects Agency (DARPA), says it needs input from as many technical people as possible.
The agency has put out an open call for anyone from a