Examine the psychological roots of crowd behavior during a riot and the role that psychology plays in policing.

The Trump administration faces a legal challenge to its deployment of the military to protests. Tensions flared after President Trump sent troops, and protests spread to other U.S. cities.

The motion is part of a lawsuit challenging the administration's expansion of the process which allows the government to quickly expel migrants.

The Los Angeles County Sheriff's Department is seeking additional victims after a suspect driving a minivan plowed into a crowd in downtown L.A.

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