Demonstrators are gathering in cities across the U.S. against President Donald Trump. That’s happening Saturday as officials urge calm, National Guard troops mobilize and Trump attends a military parade in Washington to mark the Army’s 250th anniversary.

In the Greater Boston area, thousands of “No Kings” marches and rallies are taking place, part of major demonstrations planned across the country.

The power of the US military will be sharply on display this weekend – on two different coasts and in two very different ways.

While many demonstrations against the Immigration and Customs Enforcement agency have been peaceful, with marchers chanting slogans and carrying signs, others have led to clashes with police who have sometimes used chemical irritants to disperse crowds. Hundreds have been arrested.

Photos from the “No Kings” protest in Chicago on Saturday as part of an anti-Donald Trump rally on the same day as his military parade in Washington, D.C., for his birthday.

The "No Kings National Day of Mobilizations" is scheduled to take place nationwide Saturday, June 14, with over 30 planned in Vermont.