NYT: The day before Thanksgiving, President Obama reassured Americans that there was “no specific and credible intelligence indicating a plot on the homeland.” Seven days later came an explosion of gunfire and the deadliest terrorist attack in America since Sept. 11, 2001.

What may be most disturbing is not that Mr. Obama was wrong, but that apparently he was right. By all accounts so far, the government had no concrete intelligence warning of the assault on Wednesday that killed 14 people in San Bernardino, Calif.

Swift, ruthless and deadly, the attack appeared to reflect an evolution of the terrorist threat that Mr. Obama and federal officials have long dreaded: homegrown, self-radicalized individuals operating undetected before striking one of many soft targets that can never be fully protected in a country as sprawling as the United States.

Mr. Obama prepared to address the nation on Sunday night.

http://www.nytimes.com/2015/12/06/us/politics/california-attack-has-us-rethinking-strategy-on-homegrown-terror.html?