Three days after September 11, 2001, Congress passed an unprecedented authorization of the use of military force (AUMF 2001) that remains in force today. As the theatre of operation against terrorism changes, the applicability and legality of the AUMF 2001 is under increasing scrutiny - giving way to academic discussion over its current status.

Shoon Murray is Associate Professor of International Service at American University, USA. She served as Director of the U.S. Foreign Policy Master's program at SIS from 2008 to 2014. Her other books include Anchors Against Change: American Opinion Leaders' Beliefs After the Cold War (1997) and Mission Creep: The Militarization of US Foreign Policy (2014).