Joseph Margulies is Professor of Law and Government at Cornell University. He was Counsel of Record in Rasul v. Bush (2004), involving detentions at the Guantánamo Bay Naval Station, and in Geren v. Omar and Munaf v. Geren (2008), involving detentions at Camp Cropper in Iraq. His books include Guantánamo and the Abuse of Presidential Power and What Changed When Everything Changed: 9/11 and the Making of National Identity.