Former Army captain who served on active duty in the US Army from 2000 until 2004. He recently returned from two months in Afghanistan, where he served as part of the advisory team of the commander of US troops there, General Stanley McChrystal. Andrew Exum is the author of the book This Man’s Army: A Soldier’s Story from the Frontlines of the War on Terror. He is currently a fellow with the Center for a New American Security in Washington, DC.