Japan discovered a hack into Mitsubishi Heavy Industries Ltd., which in recent years has accounted for almost one quarter of the country's defense. 80 infected computers with eight different viruses were found at the company's Tokyo headquarters. The company makes submarines, surface to air missiles, and is working with Boeing on the 787 Dreamliner jet. While it's the first major Japanese defense contractor hack to be detected and announced, it's doubtful it's the first one to ever occur.

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