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WASHINGTON, DC - JUNE 25:  Senate Homeland Security and Governmental Affairs Committee Chairman Ron Johnson (R-WI) delivers opening remarks during a hearing about the recent OPM data breach in the dirksen Senate Office Building on Capitol Hill June 25, 2015 in Washington, DC. Office of Personnel Management Director Kathrine Archuleta said that the recent report that 18 million current, former government employees and people who applied for jobs had their personal data stolen is not confirmed and that only 4.2 million records had been breached.  (Photo by Chip Somodevilla/Getty Images)
WASHINGTON, DC - JUNE 25:  Senate Homeland Security and Governmental Affairs Committee Chairman Ron Johnson (R-WI) delivers opening remarks during a hearing about the recent OPM data breach in the dirksen Senate Office Building on Capitol Hill June 25, 2015 in Washington, DC. Office of Personnel Management Director Kathrine Archuleta said that the recent report that 18 million current, former government employees and people who applied for jobs had their personal data stolen is not confirmed and that only 4.2 million records had been breached.  (Photo by Chip Somodevilla/Getty Images)

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