Obama Says of Terrorist Threat: "We Will Overcome It"

President Obama sought on Sunday to calm a jittery American public after the terrorist attack last week in California, delivering a prime-time address designed to highlight the government’s campaign against an evolving threat. Speaking from behind a lectern in the Oval Office, Mr. Obama bluntly acknowledged the heightened fears that followed attacks in Paris and in San Bernardino, Calif., which his administration over the weekend called an “act of terrorism” that was inspired, but not directed, by members of the Islamic State in Iraq and Syria.