Northrop Grumman X-47B: Us Navy's $1.5 Billion Stealth Drone

Meet the X-47B: America's $1.5 Billion Stealth Drone | Military Summary

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अमेरिकी नौसेना के X 47B स्टेल्थ कॉम्बैट ड्रोन का रूस ने खुलासा किया