Drones have only been around for a couple of decades, but already, they're reshaping the contours of conflict and raising ethical quandaries. President Barack Obama launched more than 500 drone strikes during his tenure, 10 times more than President George W. Bush. But Obama's drones strikes killed far fewer civilians than did Bush's intervention in Iraq. Still, how much should drones and robotics be used in conflict, and when, and what unintended consequences might this unleash? Peter Singer, Strategist at the New America Foundation and author of "Wired for War: The Robotics Revolution and Conflict in the 21st Century" talks with The World's Jeb Sharp.