U.S. President Barack Obama said on Sunday that recent attacks in Paris and San Bernardino, California, show that the threat of terrorism to the United States has entered a new phase, but he vowed that the nation will ultimately defeat the Islamic State and other militant groups.
The California shooting that killed 14 people on Wednesday is being investigated as an "act of terrorism," David Bowdich, assistant FBI director in Los Angeles, said at a news conference Friday.
