The biggest intelligence leaks in US history (2024)

The biggest intelligence leaks in US history (1)The biggest intelligence leaks in US history (2)Reuters

The latest leak rocking the US intelligence world is not the first time classified documents have made their way into the public eye.

On Friday, the US government charged Jack Teixeira, a 21-year-old employee with the Massachusetts Air National Guard's intelligence wing, for allegedly leaking highly sensitive documents on to the internet.

Major news organisations Bellingcat, the New York Times and the Washington Post have reported Mr Teixeira posted the highly sensitive documents to a private group on the social media platform Discord. The documents eventually leaked on to the wider internet.

They provide details into recent conditions in Ukraine, as well as intelligence on US allies like South Korea and Israel. The leaks come at a sensitive moment in Ukraine's war against Russia, as the conflict enters its second year.

This leak is the latest in a long line of unexpected disclosures of classified US documents. Some of them changed the course of US history and were hailed as heroic - while others landed their leakers in prison for years.

The Pentagon Papers

The biggest intelligence leaks in US history (3)The biggest intelligence leaks in US history (4)Getty Images

The release of the Pentagon Papers is perhaps the most famous and impactful leak of classified documents in US history.

In 1971, Daniel Ellsberg, an analyst at the RAND Corporation, leaked a report commissioned by the US military about the Vietnam War. The conflict was widely criticised at home and abroad, and the report revealed the extent to which the US government had kept details from the public.

The New York Times used the documents to publish a blockbuster expose on the scope of America's actions in Vietnam.

Mr Ellsberg was initially charged with espionage, but a judge dismissed the charges 1973. Now 92, he is now considered one of the most important government whistleblowers in US history, and a well-known advocate for government transparency.

The NSA leaks

The biggest intelligence leaks in US history (5)The biggest intelligence leaks in US history (6)Rosdiana Ciaravolo/Getty Images

In 2013, Edward Snowden leaked a tranche of intelligence documents to the Guardian and the Washington Post, showing that the US government was illegally collecting citizens' phone data.

The documents revealed the inner workings of the secretive National Security Agency, one of the primary US intelligence agencies. They also shed significant light on the secretive data collection actions taken by governments around the world, including US allies like the UK, Australia and New Zealand.

The trove of documents provided to the newspapers are some of the largest leaks in US history. The US government charged Mr Snowden with espionage and theft of government property, and Mr Snowden eventually gained asylum in Russia, where he now lives in exile.

He has become an advocate for protecting journalists against surveillance.

Chelsea Manning and Wikileaks

The biggest intelligence leaks in US history (7)The biggest intelligence leaks in US history (8)Rosdiana Ciaravolo/Getty Images

In 2010, Chelsea Manning, then a soldier and analyst in the US Army, began sharing thousands of classified documents with Wikileaks. The organisation, then led by Julian Assange, was dedicated to publishing secret documents provided to the media.

The trove of documents provided by Manning contained details about the wars in Iraq and Afghanistan, as well as a tranche of diplomatic cables. Wikileaks then made many of them public and the documents were covered by major media organisations.

One of the most notable disclosures was a graphic video of a US Apache helicopter killing 12 civilians, including two Reuters journalists, in Baghdad in 2007.

Manning was ultimately sentenced to 35 years in prison. Her sentence was commuted by President Barack Obama 2017, after she had served for seven years.

Manning unsuccessfully ran for the US Senate in 2018.

The Reality Winner case

The biggest intelligence leaks in US history (9)The biggest intelligence leaks in US history (10)Bruce Glikas/WireImage

In 2017, a former Air Force member and NSA translator, Reality Winner, was arrested and charged for providing a classified report to news website The Intercept.

The document detailed one of Russia's efforts to interfere in the 2016 US presidential election by employing a phishing scheme against local election officials.

Winner posted the document anonymously, but federal investigators were able to deduce its origins when The Intercept provided it to the NSA for verification.

After her arrest, Winner told the US television programme 60 minutes that she felt compelled to tell Americans the truth about Russia's attempts to meddle in the 2016 election, given then-President Donald Trump's repeated denials.

She had believed that "somebody needs to step forward and put this right," she told 60 Minutes.

Winner was found guilty of leaking the documents to a media organisation. She spent four years in prison and was released on probation in 2021.

Jack Teixeira's charges in full and what they tell us
Jack Teixeira charged over Pentagon leaks

US national security

Jack Teixeira

United States

The biggest intelligence leaks in US history (2024)

FAQs

Who was the source of the biggest intelligence leak in history? ›

Edward Joseph Snowden (Russian: Эдвард Джозеф Сноуден, born June 21, 1983) is a former American NSA intelligence contractor and a whistleblower who leaked classified documents revealing the existence of global surveillance programs. He became a naturalized Russian citizen in 2022.

Where can I find leaked government documents? ›

Free Resources for Finding Declassified Documents
  • CIA: Freedom of Information Act Electronic Reading Room. ...
  • Department of State: Freedom of Information Act. ...
  • FBI Records: The Vault - FOIA Library. ...
  • Federation of American Scientists: Project on Government Secrecy.
Jul 19, 2023

Who leaked US secret documents? ›

Jack Teixeira, an airman first class of the Massachusetts Air National Guard, had allegedly photographed printouts of the documents at his parents' home in Dighton, Massachusetts, and posted them to the instant messaging platform Discord on a server named "Thug Shaker Central". The earliest posts dated to October 2022.

Who was the worst spy in US history? ›

Robert Hanssen
Criminal charge(s)18 U.S.C. § 794(a) and 794(c) (Espionage Act)
Criminal penalty15 consecutive life sentences without parole
SpouseBernadette "Bonnie" Wauck ​ ​ ( m. 1968)​
Children6
12 more rows

Who was the largest CIA leak in history? ›

Joshua Schulte, largest leaker of CIA material in history, sentenced to 40 years in prison. Schulte leaked massive troves of information to WikiLeaks.

How do I find CIA released documents? ›

The documents will be available on CIA.gov and in the CIA Records Search Tool (CREST) at the National Archives in College Park, Maryland.

Does WikiLeaks still exist? ›

From November 2022, numerous documents on the organisation's website became inaccessible. In 2023, Assange said that WikiLeaks is no longer able to publish due to his imprisonment and the effect that US government surveillance and WikiLeaks' funding restrictions were having on potential whistleblowers.

What are secret government documents called? ›

Classified information is material that a government body deems to be sensitive information that must be protected. Access is restricted by law or regulation to particular groups of people with the necessary security clearance and need to know. Mishandling of the material can incur criminal penalties.

What happened to the guy who leaked the Pentagon Papers? ›

In February 2023, Ellsberg was diagnosed with pancreatic cancer and given three to six months to live; he publicly disclosed his diagnosis the following month. Ellsberg died at his home in Kensington, California, on June 16, 2023, at the age of 92.

Who was the CIA analyst who leaked documents? ›

Joshua Schulte
Other namesKinetic Panda Nuclear Option Voldemort
OccupationSoftware Engineer
EmployerCentral Intelligence Agency
Known forConvicted of the leak of classified information known as Vault 7 to WikiLeaks
4 more rows

Where is Jack Teixeira now? ›

BOSTON - Jack Teixeira pleaded guilty in federal court in Boston Monday to leaking highly classified military documents about Russia's war in Ukraine and other national security secrets. He now faces 11 to more than 16 years in prison at his sentencing in the fall.

Who is the largest producer of all source intelligence? ›

The Central Intelligence Agency (CIA) is the largest producer of all-source national security intelligence to senior U.S. policymakers.

What is the biggest leak in video game history? ›

1. Insomniac Games. A few months after the triumphant release of Insomniac's Spider-Man 2, the studio had to go through the biggest video game leak in history in December 2023. A playable build of Insomniac's upcoming PS5 exclusive, Marvel's Wolverine leaked online, years before its planned release date.

How did Hansen get caught? ›

Hanssen parked on a residential street and walked down a wooded path to a footbridge with the classified materials wrapped in a plastic bag. As Hanssen walked back to his car, the arrest team rushed up and took him into custody. Hanssen pled guilty to 15 counts of espionage on July 6, 2001.

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