Tear gas surrounds a woman kneeling in the street with her hands in the air after a protest Aug. 17, 2014, in Ferguson, Mo. (Scott Olson/Getty Images)
As the nation waits to hear whether a Missouri police officer will face charges for killing unarmed teenager Michael Brown in Ferguson, Mo., the FBI is warning law enforcement agencies across the country that the decision “will likely” lead some extremist protesters to threaten and even attack police officers or federal agents.
Peaceful protes
