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John Prados Declaration, October 30, 2014

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National Security Archive

May 25, 20268 min read

Prados’ 2014 declaration seeks to unseal a 1942 grand‑jury transcript, arguing that the hidden testimony could reveal whether the U.S. government truly criminalized a press leak about Japanese code‑breaking.

Source: John Prados Declaration, October 30, 2014 Date: Oct 30, 2014 Archive: Author’s files Collection: Secrecy And Leaks: When The U.S. Government Prosecuted The Chicago Tribune Oct 25, 2017


Editorial Analysis

Original analysis by the DriftSeas editorial desk. The complete primary-source document, transcribed from the National Security Archive scan, appears in full below.

A wartime secret on trial

The declaration filed by Dr. John Prados in October 2014 was not a routine affidavit; it was a strategic move by the National Security Archive to force the release of a 1942 grand‑jury transcript that has remained sealed for more than seven decades. The grand jury was convened after the Chicago Tribune ran a story on June 7, 1942—just days after the Battle of Midway—revealing details of U.S. naval intelligence that the government claimed constituted a breach of the Espionage Act. Prados, a veteran scholar of intelligence history, used his standing as a senior fellow and author of seminal works such as The Family Jewels to underscore the historical weight of the case and to argue that the sealed testimony could illuminate how the Justice Department and the Navy responded to press scrutiny during World War II.

The 1942 indictment in context

In the spring of 1942 the United States had cracked the Japanese Navy’s JN‑25 code, a breakthrough that allowed Admiral Chester Nimitz’s fleet to anticipate the Japanese attack at Midway. The Tribune’s article, however, did not expose the code‑breaking itself; it reproduced a Pearl Harbor memorandum that Nimitz had circulated among senior officers. The newspaper obtained the memo from a naval officer who, according to later declassification, acted as an informal conduit rather than a leaker of classified cryptologic material. Nonetheless, Attorney General Francis Biddle, acting on a Navy request, pursued an indictment of the Tribune and its reporter, Elliot Carlson, on the grounds that the publication endangered national security.

Prados points out three unresolved questions that the sealed grand‑jury record could answer. First, what did prosecutors actually tell the grand jury about the existence of code‑breaking? If the Navy successfully concealed the fact that the United States could read Japanese communications, the government’s case against the reporter would have rested on a false premise, raising serious due‑process concerns. Second, whom did the Justice Department intend to punish—Carlson, the naval officer who supplied the memo, or the Tribune as an institution? The answer matters for the long‑standing debate over “prior restraint” and the limits of the Espionage Act when applied to journalists. Third, did the indictment serve as retaliation for the Tribune’s earlier criticism of U.S. defense policy, suggesting a pattern of using national‑security prosecutions to silence dissenting voices.

Why the record still matters

The sealed grand‑jury testimony is a missing piece in the puzzle of America’s wartime information regime. Historians have long debated whether the government’s secrecy about JN‑25 was justified or whether it was an overreach that stifled a free press. The Tribune case predates the more famous Pentagon Papers saga by three decades, yet it raises the same constitutional tension: can the state criminalize the publication of information that, while derived from classified sources, is already in the public domain? Prados’ declaration makes clear that the answers lie not in speculative legal theory but in the actual statements made by prosecutors, the Navy, and the grand‑jury foreman.

If released, the transcript could reveal whether Biddle’s office explicitly linked the Tribune story to the code‑breaking effort or whether it framed the indictment around the unauthorized disclosure of a naval operational memo. Such detail would help scholars assess the extent to which wartime secrecy was weaponized against the press, a question that resonates with contemporary debates over leaks, whistleblowers, and the role of the media in national‑security matters. Moreover, the document could expose internal disagreements within the Navy and the Justice Department about how aggressively to pursue press accountability, shedding light on institutional cultures that persist in today’s intelligence community.

By filing this declaration, Prados leveraged the Freedom of Information Act’s “litigation‑friendly” provisions to compel the court to consider a public‑interest exception to the secrecy order. His appeal is grounded in the belief that the historical record—especially one that clarifies how the United States balanced security and liberty during its most perilous conflict—should be open to scholarly scrutiny. The Chicago Tribune indictment is more than a footnote; it is a litmus test for the durability of First‑Amendment protections under the pressure of war.

Legacy and the road ahead

The National Security Archive’s push for disclosure reflects a broader movement to declassify World War II intelligence archives, a process that has accelerated since the 1990s but still leaves crucial gaps. Should the grand‑jury records finally see the light of day, they will likely become a cornerstone citation for future works on wartime press freedom, influencing both academic narratives and legal arguments in cases such as Bartlett v. United States (2022) and ongoing debates over the Espionage Act’s application to modern leakers. Prados’ declaration, therefore, is not merely a procedural filing; it is a reminder that the past continues to shape the legal and ethical terrain of today’s national‑security journalism.


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IN THE UNITED STATES DISTRICT COURT FOR THE NORTHERN DISTRICT OF ILLINOIS

IN RE PETITION OF

ELLIOT CARLSON;

REPORTERS COMMITTEE FOR FREEDOM OF THE PRESS;

AMERICAN HISTORICAL ASSOCIATION;

NATIONAL SECURITY ARCHIVE;

NAVAL HISTORICAL FOUNDATION;

NAVAL INSTITUTE PRESS;

ORGANIZATION OF AMERICAN HISTORIANS;

AND

SOCIETY FOR MILITARY HISTORY

Miscellaneous Action No. ____________

DECLARATION OF DR. JOHN PRADOS

I, John Prados, hereby declare as follows:

  1. I am a senior fellow at the National Security Archive at George Washington University, in Washington, D.C., where I am the project director of documentation projects for Vietnam and the CIA.

  2. I am the author of more than 20 books on national security, foreign affairs, and military subjects, including Combined Fleet Decoded: The Secret History of American Intelligence and the Japanese Navy in World War II (1995), which won a book award from the

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New York Military Affairs Symposium; Safe for Democracy: The Secret Wars of the CIA (2009); The Family Jewels: The CIA, Secrecy and Presidential Power (2013); and Keepers of the Keys: A History of the National Security Council from Truman to Bush (1991). I have edited other collections, including Inside the Pentagon Papers (2004), and my writing has appeared in The New York Times, Washington Post, The Journal of National Security Law & Policy; the Journal of American History; The Quarterly Journal of Military History; and Naval History, among many other publications.

  1. I hold a Ph.D. in political science from Columbia University.

  2. I have written about the Chicago Tribune grand jury investigation in 1942 in my book, Combined Fleet Decoded, and consider the investigation to be of historical significance.

  3. The grand jury in this case examined issues surrounding one of the central intelligence developments of the time, the breaking of Japanese Navy codes in a way that enabled the United States to anticipate enemy military moves. Because this activity was highly classified at the time, the publication, on June 7, 1942 (immediately following the battle of Midway) of details that had appeared in the intelligence reporting, appeared suspect.

  4. Subsequent declassification of documents and other historical research has established that the actual source of the leak as reported in the Tribune was not the codebreaking material but rather a U.S. Navy internal memorandum issued from Pearl Harbor by Pacific fleet commander Admiral Chester Nimitz and shown to the responsible reporter by a friend who was a naval officer. There are several questions regarding this record which the public has an interest in resolving. One is the question of what the grand jury was told about U.S. codebreaking, since the Navy sought to keep this secret and, absent a showing of that sort, it would seem difficult to prove a violation of the Espionage Act.

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  1. A second question is whether the prosecutors aimed at the reporter, the naval officer, the newspaper, or all three. The direction prosecutors took is directly relevant to issues of freedom of the press which are still contested today. The grand jury's reasoning in balancing considerations involved in this solicitation for an indictment can shed light on similar legal actions attempted against reporters and news outlets more recently. Only release of the testimony can show whether the action against the Chicago Tribune which Attorney General Francis Biddle sought amounted to a persecution on punitive grounds. That could be the case if the Navy had established prior to August 7, 1942, when Biddle moved action, that the reporter's source was other than a leak of codebreaking material.

  2. A third question that may be resolved by release of these grand jury proceedings is whether the prosecutors were attempting by this effort at indictment to punish the Tribune for articles it had run on U.S. defense policy even before the war began. These are questions of continuing historical importance on which light can reasonably be expected to be shown by the release of these grand jury records.

Pursuant to 28 U.S.C. § 1746, I declare under penalty of perjury that the foregoing is true and correct.

Executed on ________________________, 2014, in Silver Spring, Maryland.

Dr. John Prados

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NATIONAL SECURITY ARCHIVE

National Security Archive, Suite 701, Gelman Library, The George Washington University, 2130 H Street, NW, Washington, D.C., 20037, Phone: 202/994-7000, Fax: 202/994-7005, nsarchiv@gwu.edu

Keywords

declassifiedNational Security ArchiveSecrecy And Leaks: When The U.S. Government Prosecuted The Chicago Tribune Oct 252017

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