York, this the nbc nightly news. Report tonight, lester hold. Good evening, details of our top story are still breaking. Word coming down late this afternoon of what sources are telling us is a massive chinese hack of u. S. Government computers. Perhaps on a scale never seen in this country before. The target the agency that handles Government Employee records. Putting at risk the personnel files of millions of current and former federal employees. Nbcs Andrea Mitchell is on it and has late details. Reporter Officials Say this could be the biggest cyberattack in american history. The culprit, they say, china. As many as 4 million current and former Government Employees have been told their personal information, including names, Social Security numbers, and birthdays, could have been hacked from the office of personnel management, the agency that screens and hires federal workers and does security clearances for 90 of the federal government. Tonight the Obama Administration is scramblin
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