The United States and its NATO allies responded 10 years ago this week to the 9/11 attacks with a military campaign to oust Al-Qaeda's Taliban hosts. The conflict went on to become the longest war in U.S. history as international and Afghan forces battled a fierce insurgency, with casualties and frustrations mounting within the war-weary Afghan public and the international community.
10 Years Of Afghan War

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ISAF air-rescue operations in the flooded Deh Rawod District near Afghanistan's Helmand-Oruzgan provincial border in March 2007.

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U.S. Marines in Helmand Province watch the television announcement of the death of Osama Bin Laden on May 2, 2011, at the hands of U.S. forces.

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Taliban militants are seen with their weapons in an undisclosed location in Afghanistan in January 2009.

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Afghan girls attend a Kabul ceremony marking International Peace Day in 2007.