Pentagon Removes 25 Years of Weapons Testing Data to Enhance Security

On July 30, 2026, the Pentagon removed 25 years of weapons testing publications from its public website, a decision driven by concerns that unclassified data could be processed by artificial intelligence into information resembling classified intelligence. Amy Henninger, the Pentagon’s Director of the Weapons Testing Office, described the action as a necessary operational security measure. She noted that foreign adversaries now possess the capability to aggregate publicly available documents and extract sensitive insights that the U.S. did not intend to disclose.

The removed documents originated from the Director of Operational Test and Evaluation office, known as DOT&E, which has historically provided annual reports on weapons programs accessible to the public, Congress, and defense researchers. With these reports now offline, the Pentagon has characterized its decision as proactive, indicating that it sought to prevent potential breaches before they occurred.

However, critics express skepticism regarding the security rationale. The timing of the removal coincides with recent staffing reductions within the DOT&E office, which has diminished the oversight capacity that watchdog groups and lawmakers depend on to assess the effectiveness of military programs. This dual action of pulling public data while simultaneously reducing internal oversight creates a visibility gap that affects both adversaries and domestic stakeholders, including Congress and independent researchers.

Defense contractors whose programs were previously documented in the now-removed reports face increased opacity regarding their operations. Investors and analysts who relied on DOT&E publications to evaluate the performance of weapons systems now lack access to critical information. This situation raises broader concerns about the tightening information environment surrounding U.S. defense spending, especially as that spending continues to grow. The combination of reduced visibility into program performance and diminished oversight staffing heightens uncertainty for those attempting to assess the defense sector from an external perspective.