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RQ-180 secret, stealth drone breaks cover in wartime

A secret RQ-180A stealth drone emergency landing in Greece exposes its covert role over Iran’s contested airspace.
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Manta ray: DARPA’s underwater drone that can stay at sea for months

Northrop Grumman’s Manta Ray is a new extra-large uncrewed underwater vehicle designed to operate in the deep ocean for months without human support. Developed under DARPA’s Manta Ray program, the ...