This file photo shows US soldiers arriving at an airbase in Kandahar. The last of the 33,000 US soldiers that President Barack Obama sent to Afghanistan nearly three years ago as part of a military

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This file photo shows US soldiers arriving at an airbase in Kandahar. The last of the 33,000 US soldiers that President Barack Obama sent to Afghanistan nearly three years ago as part of a military surge have left the country, US defense officials said.

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