What's With the Red Balloons? Military Offers $40k in Contest

It almost sounds like it's too much fun to have been hatched by the military: Find 10 giant, red balloons hidden somewhere in the U.S. and you could win $40k? But it's true. Today the Defense Department's Defense Advanced Research Projects Agency, or DARPA, "launched" 10 eight-foot-wide red balloons in a nationwide high tech treasure hunt. Open to anyone in the country, the DARPA Network challenge is designed to explore social networks and Internet communication. Finding balloons will require...Full Story