Defense Department officials don't expect China to achieve "an effective operational capability" with the stealthy J-20 combat aircraft prior to 2018, states the Pentagon's new report to Congress on Chinese military developments, issued Aug. 24, 2011. China unveiled the J-20 prototype in December 2010 and began flying it in January 2011. Here, the J-20 shown during testing in Chengdu, China.
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