National security: America's new robotic army By: CNBC.com News March 03, 2014 at 12:14 PM EST The U.S. military's human footprint is shrinking, but its robotic fighting force is on the rise, transforming the battlefield in air, land and sea. Read More >> Related Stocks: Boeing Co Genl Dynamics Kaman Corp Lockheed Martin Northrop Grumman