A Defense Department analyst and a former engineer for Boeing Co. were accused Monday in separate spy cases with helping deliver military secrets to the Chinese government, the Justice Department said. Additionally, two immigrants from China and Taiwan accused of working with the defense analyst were arrested after an FBI raid Monday morning on a New Orleans home where one of them lived. The two cases — based in Alexandria, Va., and Los Angeles — have no connection, and investigators said it was merely a coincidence that charges would be brought against both on the same day.The arrests mark China's latest attempts to gain top secret information about U.S. military systems and sales, said Assistant Attorney General Kenneth Wainstein.

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