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WASHINGTON, DC - DECEMBER 6: U.S. President Barack Obama addresses the country from the Oval Office on December 6, 2015 in Washington, DC. President Obama is addressing the terrorism threat to the United States and the recent attack in San Bernardino, California. (Photo by Saul Loeb-Pool/Getty Images)
WASHINGTON, DC - DECEMBER 6: U.S. President Barack Obama addresses the country from the Oval Office on December 6, 2015 in Washington, DC. President Obama is addressing the terrorism threat to the United States and the recent attack in San Bernardino, California. (Photo by Saul Loeb-Pool/Getty Images)

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President Obama: 'This was an act of terrorism'

President Obama comments on the deadly shooting in San Bernardino in a historic Oval Office address, calling it an "act of terrorism."

President Obama: 'This was an act of terrorism'

President Obama comments on the deadly shooting in San Bernardino in a historic Oval Office address, calling it an "act of terrorism."