U.S. Army Spc. Nicholas Cerreto, right, helps a fellow soldier prepare on Forward Operating Base Farah before departing for a mission in Farah City in Afghanistan's Farah province, Aug. 29, 2012. Cerreto is assigned to Provincial Reconstruction Team Farah. U.S. Navy photo by Lt. Benjamin Addison

President Barack Obama addresses service members and their families during a visit to Fort Bliss, Texas, Aug. 31, 2012. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

President Barack Obama addresses service members and their families during a visit to Fort Bliss, Texas, Aug. 31, 2012. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

President Barack Obama addresses service members and their families during a visit to Fort Bliss, Texas, Aug. 31, 2012. DOD photo by U.S. Navy Petty Officer 1st Class Chad J. McNeeley

Soldiers assigned to the 1st Armored Division wait to hear President Barack Obama's speech on Fort Bliss, Texas. Obama discussed the future of the Army and the United States. U.S. Army photo by Spc. Melissa Parrish

President Barack Obama talks to soldiers about the future of the Army and the United States during a visit to Fort Bliss, Texas, Aug. 31, 2012. The soldiers are assigned to the 1st Armored Division. U.S. Army photo by Spc. Melissa Parrish

U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, receives a briefing from members of the Irish Defense Forces at Brugha Barracks in Dublin, Aug. 31, 2012. DOD photo by D. Myles Cullen

U.S. Army Gen. Martin E. Dempsey, chairman of the Joint Chiefs of Staff, speaks to members of the Senior Command and Staff Course at Brugha Barracks in Dublin, Aug. 31, 2012. DOD photo by D. Myles Cullen