Craig Whitlock led the Washington Post's years-long effort to obtain hundreds of secret interviews about the Afghan war. The result: A week-long series and a database of the Afghanistan Papers. Whitlock speaks with Brian Stelter about the Post's legal battles, his main findings, and the information he is still seeking. Through this treasure trove of documents, "we've finally broken through with the truth about the war," he says. He also discusses comparisons to the Pentagon Papers.

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