Theyre called lethal autonomous weapons, or LAWs, and their military mission would be to seek out, identify and kill a human target independent of human control. Representatives of 60 nations ... met in Geneva during the third week of April in an attempt to define the level of artificial intelligence needed for an international definition of robotic autonomy. The Panel of Experts, under the Convention on Conventional Weapons (CCW), will meet again next year to continue the discussion. None of the industrial nations admits having a LAW, but theres really no way to confirm the nonexistence of a weapon that would be classified as secret. The U.S. Department of Defense has had a directive in place for three years that outlines the chain of command that would approve their deployment on a case-by-case basis. Its called Directive 3000.09. On April 15, the third day of the panel meeting, Secretary of the Navy Ray Mabus ... announced the creation of a new office for unmanned warfare systems. According to Stuart Russell, who addressed the panel, Devices in the 1-gram range might be able to selectively kill a chosen human target on contact using a shaped explosive charge. Im not sure what countermeasures one might try against a swarm of 5-gram robots. There will be ... a LAWs arms race.