Stealthy no more? A German radar vendor says it tracked the F-35 jet in 2018 — from a pony farm

In the illustrious history of the F-35 fighter jet, add a pony farm outside Berlin as the place where one company claims the plane’s stealth cover was blown. The story that follows is a snapshot in the cat-and-mouse game between combat aircraft — designed to be undetectable by radar — and sensor makers seeking to undo that advantage. In the case of the F-35, the promise of invisibility to radar is so pronounced that it has colored much of the jet's employment doctrine.

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