Mandatory Credit: Photo by Khalid Mohammed/AP/Shutterstock (6918755h)
U.S. Army soldiers with 1st Brigade, 1st Cavalry Division stand near their armored vehicles before they start their journey home at Contingency Operating Site Kalsu, about 55 kilometers (35 miles) south of Baghdad, Iraq on . The U.S. has promised to withdraw from Iraq by the end of the year as required by a 2008 security agreement between Washington and Baghdad
Mideast Iraq US Troops, Baghdad, Iraq
Mandatory Credit: Photo by Khalid Mohammed/AP/Shutterstock (6918755h) U.S. Army soldiers with 1st Brigade, 1st Cavalry Division stand near their armored vehicles before they start their journey home aShow more

US troops unlikely to withdraw from Iraq anytime soon, experts say