The Sea-Based X-Band Radar (SBX), an enormous floating radar ship, was supposed to be able to detect even tiny incoming objects into U.S. airspace from thousands of miles away. SBX, built by Boeing and Raytheon, was going to guide rocket interceptors to enemy ballistic missiles before they could reach U.S. soil. But after a $2.2 billion investment, MDA realized SBX couldn’t distinguish between missiles and decoys. The technology has been mothballed at Pearl Harbor in Hawaii.
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