<ul><li>Expensive military equipment like Bradley Fighting Vehicle and Abrams tanks have been vulnerable to drones in the Ukraine war.</li><li>US military leaders are evaluating the threat posed by cheap drones to expensive weapons used in future conflicts.</li><li>Army secretary emphasizes that it's not worth investing in costly weapons that can be easily taken out by low-cost drones.</li><li>Russian drones, produced at a fraction of the cost, have raised concerns about the effectiveness and cost efficiency of US military equipment.</li></ul>

Army secretary says US can't keep pumping money into expensive weapons that can be taken out by an $800 Russian drone

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