At the intersection of alliance and rivalry, American intelligence has surfaced a quiet but consequential warning: the proposed sale of F-35 fighter jets to Saudi Arabia may open a door — however narrow — through which China could glimpse the inner workings of the United States' most advanced military aircraft. The Defense Intelligence Agency has identified two pathways of concern, espionage and cooperation, each rooted in the same geopolitical reality: Saudi Arabia sits at the crossroads of deep American partnership and expanding Chinese influence. The warning is not an accusation but a recko