The United States’ longest war is coming to a close, as the last remaining troops in Afghanistan evacuate Americans and their allies from the airport in Kabul. The war began after 9/11, and four presidents have presided over it. We looked back at the key moments and speeches from those administrations that will define the history of the war.

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20 Years, 4 Presidents, And $2 Trillion: Full Timeline Of The US War In Afghanistan