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An F-16 maneuvers during an airshow in Goshen, Indiana, on July 10. Photo: Steven Cardo/DVIDS

Northrop Grumman foresees "a lot of runway ahead" for its Scalable Agile Beam Radar, which is being installed in F-16s around the world.

Why it matters: Upgrades like SABR are, piece by piece, future-proofing the venerated Lockheed Martin-made fighter.