New Sensor To Reduce 'Friendly Fire' During Combat. The U.S. Army will test these sensors this fall. If the results of the tests are as successful as envision the Sandia team, these radar tags might be carried by every soldier in the future. With several thousands of soldiers on a single battlefield, I'm wondering if this system can work, and in real time. Any comments?

[Smart Mobs]

How about friends of friends?