On his 79th birthday, President Trump spent more than three hours on Saturday taking in the scene at a military parade commemorating the 250th anniversary of the U.S. Army.

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.

Protests in San Francisco, Oakland and San Jose were part of the nationwide "No Kings" movement on Saturday. The events were described as a "nationwide day of defiance" by organizers, and demonstrations happened around the country.

At least one demonstration, about 70 miles from Washington, D.C., in Northern Virginia, was met with violence when a man intentionally drove an SUV through a crowd of departing protesters, striking at least one person,