U.S. Senator John McCain said he would use his power to block the confirmation of a key cybersecurity official if necessary to prevent any Obama administration move to separate the U.S. Cyber Command from the National Security Agency. "I do not believe rushing to separate the 'dual hat' in the final months of an administration is appropriate, given the very serious challenges we face in cyberspace," McCain, the Republican chairman of the Senate Armed Services Committee, said at a hearing.
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