Photo by: Saul Loeb In this Dec. 6, 2015, photo, President Barack Obama addresses the nation from the Oval Office at the White House in Washington. Fears of terrorism are hanging over America’s holiday season, and Obama plans a series of events this week aimed at trying to allay concerns about his strategy for stopping the Islamic State group abroad and its sympathizers at home. (Saul Loeb/Pool Photo via AP) ** FILE **