In this powerful talk, P.W. Singer shows how the widespread use of robots in war is changing the realities of combat. He shows us scenarios straight out of science fiction -- that now may not be so fictitious.

Peter Warren Singer is the director of the 21st Century Defense Initiative at the Brookings Institution -- where his research and analysis offer an eye-opening take on what the 21st century holds for war and foreign policy. His latest book, Wired for War, examines how the US military has been, in the words of a recent US Navy recruiting ad, "working hard to get soldiers off the front lines" and replacing humans with machines for bombing, flying and spying. He asks big questions: What will the rise of war machines mean to traditional notions of the battlefield, like honor? His 2003 book Corporate Warriors was a prescient look at private military forces. It's essential reading for anyone curious about what went on to happen in Iraq involving these quasi-armies.