President Obama receives a briefing on Aug. 19, 2011, from Homeland Security and Counterterrorism adviser John Brennan in Martha's Vineyard, Mass. (Courtesy of the White House)
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President Obama receives a briefing on Aug. 19, 2011, from Homeland Security and Counterterrorism adviser John Brennan in Martha's Vineyard, Mass. (Courtesy of the White House)
