President Barack Obama will tell Americans on Sunday what the government is doing to keep them safe following the mass killing by a couple in California last week that is being investigated as an "act of terror."
In a rare Oval Office address at 8 p.m. ET (0100 GMT), Obama will lay out the security steps the United States has taken since Islamic State's Nov. 13 attacks in Paris that killed 130 people, an administration official told Reuters.
Under pressure from Republicans over the Islamic State threat, Obama will also will say he will use "every single aspect of American power" to destroy the militant group, the official said.
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