No one knows the best way to stop a drone

This year, the world saw a long-theorized weapon in action: a commercial drone, like a person might find at Best Buy, dropping a bomb on a target in Iraq. These drone bombers, used by the ultra-violent quasi-state ISIS in Iraq and Syria, are the flashiest combination of modern technologies with the modern battlefield. Cheap, camera-carrying robots, put to nefarious ends by a group that could never otherwise dream of fielding an air force. Dropping grenades isn't the deadliest thing an insurgent group can do with a small flying robot, but it leads to a very important question: What, exactly, is the answer to such a drone? There is--and this is rare for the defense world--no clear answer yet. The answer to a tank is a guided missile, fired by shoulder-launcher, helicopter, or low-flying attack plane.