Soldiers from 4th Brigade, 1st Armored Division, US Army, turn in weapons at Fort Bliss in El Paso of Texas, the United States, Dec. 12, 2011. Some 270 soldiers of 4th Brigade returned from Iraq and reunited with their family on Monday. U.S. military forces are to pull out completely from Iraq by the end of 2011, according to a security pact, named Status of Forces Agreement (SOFA), signed late in 2008 between Baghdad and Washington. [Xinhua]