Gen. John Campbell, commander of NATO's International Security Assistance Force, takes part in a flag-lowering ceremony in Kabul International Airport in Afghanistan.Commander of International Security Assistance Force, General John F. Campbell, center, takes part in a flag-lowering ceremony in Kabul International Airport in Kabul, Afghanistan, Monday, Dec. 8, 2014. The U.S. and NATO ceremonially ended their combat mission in Afghanistan on Monday, 13 years after the Sept. 11 terror attacks sparked their invasion of the country to topple the Taliban-led government. (AP Photo/Massoud Hossaini) Photo: Massoud Hossaini / Massoud Hossaini/Associated Press / AP
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