Protests that break out remain mostly peaceful during the day, but at night agitators engage in fiery clashes with police.

This is the intense moment a heroic bystander sheltering in place with demonstrators taking cover from reports of an active shooter at the June 14 Salt Lake City, Utah 'No Kings' protest sees a rifle in a man's backpack.

Demonstrators gathered in communities large and small. Many events on the East Coast have ended, but police clashed with some protesters in L.A.

Andrea Nakano reports on an organizer pushing for peaceful protest. It comes as the FBI offers a reward for a person seen hitting a federal agent at a Concord protest. Website: YouTube: Facebook: I

Thousands of “No Kings” protests unfolded across South Florida and the nation on June 14. Demonstrators voiced their opposition to President Donald Trump’s policies, emphasizing themes of democracy and unity amid a backdrop of political tension

Police on horseback dispersed crowds in L.A. before the curfew came into effect at 8 p.m. local time on Wednesday evening. (The curfew lifts at 6 a.m.) An estimated 400 arrests and detentions have taken place so far amid the ongoing protests in the southern Californian city.

In recent years, in Baltimore and elsewhere, there have been efforts and scholarship on how cities can best handle demonstrations and how organizers can most successfully promote their cause.

The president deployed 4,000 National Guard troops and 700 Marines to Los Angeles in response to anti-ICE protests.

NBC News' Jacob Soboroff reports from Los Angeles City Hall where thousands of protesters have gathered for a 'No Kings' protest against the Trump administration and ahead of the president's Washington D.