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Before he was helping plan the Vietnam War, Ellsberg was working at Rand Corporation as a nuclear war planner. In the late 1950’s and early 60’s, he came across a classified policy document that called for killing a fifth of the human population. “This, to me, was pure evil.” When he was facing trial for releasing the Pentagon Papers, he held another trove of secret documents on the Pentagon’s plans for nuclear war. His plan was to release these, most likely from prison. But in a strange twist, a natural disaster interrupted his plans.

In the series finale, the whistleblower leaks documents on U.S. nuclear policy in the Taiwan Straits written by his colleague Morton Halperin at the height of the Cold War. The documents, embedded below, are still considered classified, and could put him at risk of prison time.

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