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FILE -- In this Thursday, July 14, 2011 file photo, U.S. soldiers board a U.S. military plane, as they leave Afghanistan, at the U.S. base in Bagram north of Kabul, Afghanistan. The United States is not alone in pulling combat troops off the Afghan battlefield. More than a dozen other countries have draw down plans that combined with the U.S. withdrawal will shrink the foreign military footprint in Afghanistan by more than 40,000 troops by the close of next year. (AP Photo/Musadeq Sadeq, File)

US troops withdraw from Afghanistan

Nearly two years after President Barack Obama ordered 33,000 more U.S. troops to Afghanistan to tamp down the escalating Taliban violence, the last of those surge troops have left the country, U.S. officials said Sept. 20.