An act of international terrorism on the streets of Washington, DC, still reverberates 50 years later.

Washington, D.C., September 21, 2026 - As part of a “major case” investigation into the role of General Augusto Pinochet in an act of terrorism in Washington, D.C., the FBI interviewed former secretar...

Washington, D.C., June 3, 2025 - The Trump administration’s intention to acquire Greenland, including possibly by force, has put a focus on the history of its strategic interest to U.S. policymakers. ...

Washington, D.C., September 17, 2026 - As U.S. officials prepared for the landmark 1997 Conference of Parties (COP) climate negotiations in Kyoto, Japan, they increasingly recognized a simple reality:...

TikTok video by National Security Archive

Washington, D.C., August 31, 2026 - The “fundamental reevaluation” that took place in the Kremlin under General Secretary Mikhail Gorbachev not only encompassed the political, ideological, and economi...

Washington, D.C., August 31, 2026 - The “fundamental reevaluation” that took place in the Kremlin under General Secretary Mikhail Gorbachev not only encompassed the political, ideological, and economi...

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Create an account or log in to Instagram - Share what you're into with the people who get you.

TikTok video by National Security Archive

TikTok video by National Security Archive

New accounts show the oil and gas industry trying to weaken methane reporting while saving the federal emissions system it relies on.

The Energy Department tried to use a mass "still interested" notice to close older FOIA requests. A federal judge found the agency had no authority to do that.

New accounts show the oil and gas industry trying to weaken methane reporting while saving the federal emissions system it relies on.

Washington, D.C., August 18, 2026 – The fossil fuel industry is trying to weaken methane reporting requirements while simultaneously fighting to preserve the related federal emissions database it reli...

New accounts show the oil and gas industry trying to weaken methane reporting while saving the federal emissions system it relies on.

Challenging government secrecy, informing the public debate through access to declassified documents, ensuring government accountability, and defending the right to know in the US and abroad.

Washington, D.C., August 8, 2024 – On the week of the 79th commemoration of the U.S. atomic bombings of Hiroshima and Nagasaki, Japan, the National Security Archive today publishes a fascinating new c...

YouTube video by nsarchive

The first full U.S. report on the results of the atomic bombing of Hiroshima, 80 years ago this week, made a “conservative estimate” that around 100,000 people had been killed, according to a newly pu...

TikTok video by National Security Archive

YouTube video by nsarchive

YouTube video by nsarchive

TikTok video by National Security Archive

YouTube video by nsarchive

Latest update: July 21, 2026

TikTok video by National Security Archive

YouTube video by nsarchive

TikTok video by National Security Archive

1 likes, 0 comments - natsecarchive on July 17, 2026: "CW: This video includes descriptions of CIA actions that violated and harmed humans and animals. In the 1960s, the CIA tried to use cats as spie...

Challenging government secrecy, informing the public debate through access to declassified documents, ensuring government accountability, and defending the right to know in the US and abroad.

Armando Fernández Larios ayudó a planear un ataque con coche bomba en Washington que mató a dos personas en 1976. Cincuenta años después, antiguos secretos del gobierno podrían decidir su destino.

Challenging government secrecy, informing the public debate through access to declassified documents, ensuring government accountability, and defending the right to know in the US and abroad.

1 likes, 0 comments - natsecarchive on July 17, 2026: "CW: This video includes descriptions of CIA actions that violated and harmed humans and animals. In the 1960s, the CIA tried to use cats as spie...

36 likes, 0 comments - natsecarchive on July 10, 2026: "Who defines the line of government transparency? 25 years ago, for the first time ever, the National Security Archive published all 3 versions...

He helped plot a car bombing in Washington that killed two people in 1976. Fifty years later, old government secrets could decide his fate.

Washington D.C., July 10, 2026 - On October 27, 2025, U.S. Immigration and Customs Enforcement (ICE) agents quietly detained Armando Fernandez Larios, a former Chilean secret police operative living i...

Washington, D.C., July 9, 2026 - Sixty years after President Lyndon B. Johnson reluctantly signed the Freedom of Information Act (FOIA) into law, Americans enjoy a national transparency treasure in th...

Washington D.C., July 10, 2026 - On October 27, 2025, U.S. Immigration and Customs Enforcement (ICE) agents quietly detained Armando Fernandez Larios, a former Chilean secret police operative living i...

He helped plot a car bombing in Washington that killed two people in 1976. Fifty years later, old government secrets could decide his fate.