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NSA chief warns Chinese cyber attacks could shut U.S. infrastructure
Nov 21 2014 3:41AM EST | Source: REUTERS TechnologyWASHINGTON (Reuters) - China and "probably one or two" other countries have the ability to invade and possibly shut down computer systems of U.S. power utilities, aviation networks and financial companies, Admiral Mike Rogers, the director of the U.S. National Security Agency, said on Thursday.