?With little public scrutiny, robotics is quickly revolutionizing not only how war is fought, but who fights in war. While the U.S. military first began to experiment with remote-controlled weapons during World War I, the Pentagon had no robots on the ground when it invaded Iraq in 2003, and only a handful of unmanned aerial vehicles (UAVs) in the air. Today, according to P.W. Singer, author of Wired for War and a senior fellow at the Brookings Institution, the U.S. military has some 7,000 UAVs in operation ? more than double the number of manned aircraft in its arsenal ? and more than 12,000 robots on the ground in Iraq alone.?