“The F-35 was at a distinct energy disadvantage,” the unnamed pilot wrote in a scathing five-page brief that War Is Boring has obtained. The brief is unclassified but is labeled “for official use only.”

The test pilot’s report is the latest evidence of fundamental problems with the design of the F-35 — which, at a total program cost of more than a trillion dollars, is history’s most expensive weapon.

The U.S. Air Force, Navy and Marine Corps — not to mention the air forces and navies of more than a dozen U.S. allies — are counting on the Lockheed Martin-made JSF to replace many if not most of their current fighter jets.

And that means that, within a few decades, American and allied aviators will fly into battle in an inferior fighter — one that could get them killed … and cost the United States control of the air.