For two decades, the taxpayers who foot the bill for the most expensive weapon in human history got one honest annual accounting of it: the Government Accountability Office’s yearly review of the F-35. This year, the Pentagon locked it in a drawer.

The GAO confirmed on 15 July 2026 that the Defense Department had stamped its latest F-35 production-and-modernization report “Controlled Unclassified Information” — the bureaucratic label that means not a single page reaches the public. According to the watchdog, it is the first time in more than 20 years of annual F-35 reviews that the entire report has been withheld.

The timing is not exactly subtle. The last several public GAO reviews were bruising, and now the one document that gave outsiders a clear look at the trillion-dollar jet has gone dark.

Two Decades of Sunlight, Switched Off

Congress ordered the GAO to review the F-35 every year starting in 2005, and every year since it delivered a public verdict on schedules, costs and readiness. That streak just ended. The auditors say the Pentagon determined this year’s edition contains CUI — a category for sensitive-but-unclassified material — and restricted all of it.

The GAO did not hide its discomfort with the decision, noting how unusual it is for one of its acquisition reviews to be locked away in full.

Key lawmakers will still see the findings, but not every member of Congress gets the complete, unredacted version — and voters get nothing at all. For a program the public has been paying into for a quarter of a century, that is a meaningful door slamming shut.

What the Public Already Knew

The move stings precisely because recent public reports were unflattering. Earlier GAO reviews put the F-35’s projected lifetime bill north of $2 trillion across roughly 2,470 aircraft and a 77-year life cycle, driven largely by the cost of keeping the jets flying rather than buying them.

Readiness told a similar story. The share of F-35s able to perform every one of their assigned missions — the full mission-capable rate — had slid to about a quarter of the fleet in fiscal 2025, well below the targets the services set for themselves. Those were the kinds of numbers the annual report reliably surfaced.

Why It Matters

Transparency advocates worry less about this single report than about the precedent. If the Pentagon can wrap its most-scrutinized program in CUI, the same label can quietly smother oversight of the next one. Several analysts have urged Congress to demand a redacted public version, a line-by-line justification for the CUI stamp, and a firm release deadline.

The F-35 will still fly, still cost a fortune, and still generate headlines. The difference, starting this year, is that the public’s clearest window into it has been painted over — and nobody outside a small circle gets to decide when it opens again.

Business Insider’s True Cost breakdown lays out how the F-35 became the priciest weapons program ever conceived — the context that makes this year’s blackout so contentious.

Sources: U.S. Government Accountability Office; Bloomberg; Forbes; The Hill; South China Morning Post.