加州枪击事件后奥巴马努力缓解恐怖主义带来的恐惧

U.S. President Barack Obama is making a rare primetime television address to the country late Sunday, hoping to calm Americans' fears about terrorist attacks and lay out the United States campaign against "the broader threat of terrorism."

He also plans to update the country on the investigation into last week's mass shooting in California, where U.S.-born Syed Rizwan Farook and his Pakistani wife Tashfeen Malik killed 14 people and wounded another 21 in a hail of gunfire at a holiday gathering of local government workers in San Bernardino

The White House said Obama will discuss the nature of the terrorist threat, "how it has evolved, and how we will defeat it."

Obama "will reiterate his firm conviction" that Islamic State insurgents "will be destroyed and that the United States must draw upon our values, our unwavering commitment to justice, equality and freedom..."

Obama will speak from the Oval Office in the White House, where U.S. presidents have delivered some of their most significant speeches.  Obama last gave a televised speech from the Oval Office to announce the end of U.S. ground combat operations in Iraq in 2010.