A severed pig's head was left outside a mosque in Philadelphia. An Islamic center in Florida was defaced. After California shooting, fears of Muslim harassment rise.
FBI: The two San Bernardino shooters were radicalized at least two years ago and had discussed jihad and martyrdom as early as 2013.
It's unusual for a woman to be involved in mass violence in the United States. But the increasing number of women drawn to ISIS is worrisome.
FBI officials have raised questions about whether any “red flags” were raised by State Department officials over the male California shooter's fiance visa.
One of the suspects in the deadly shooting rampage at a California social service center grew up in a family riven by violence.
"It is possible that this was terrorist-related," stated President Barack Obama about the mass shooting in California that killed 14 people.