AdvertisementU.S. 'Connects The Dots' To Catch Roadside BombersDecember 03, 2010Tom GjeltenfacebookEmailMarines on patrol in Afghanistan's Helmand province walk near a blast crater from a homemade explosive device. Roadside bombs are the leading killer of U.S. troops in Iraq and Afghanistan. The American military has turned to mathematics and social network analysis to help identify bombers and their supporters. (NPR)