Singer, an analyst at The Brookings Institution, is the author of the book Corporate Warriors: The Rise of the Privatized Military Industry. He'll discuss the use of private military contractors in Iraq, especially in light of the abuses at the Abu Ghraib prison where civilian military contractors were involved in interrogations. Singer is an Olin Fellow in the Foreign Policy Studies Program at the Brookings Institution and coordinator of the Brookings Project on U.S. Policy Towards the Islamic World.