A few images from the inauguration.
Did you know?
Hail To The Chief was composed around 1812 by London conductor James Sanderson, in part by putting lines from Scottish writer Sir Walter Scott to music.
The composition was given official status as an accompaniment to U.S. presidents in the 1950s. In addition to its use in the inauguration, it is played to introduce U.S. presidents at many formal appearances. It's in the public domain.
The tradition of a presidential procession down Pennsylvania Avenue to the White House was begun by the country's third president, Declaration of Independence author Thomas Jefferson, at his second inauguration, in 1805. That was in March, though. The only president since then who didn't lead such a parade was Ronald Reagan to start his second term, in 1985, due to freezing temperatures and high winds.
After the luncheon at the Capitol Rotunda, Trump, as the country's new commander in chief of the armed forces, will review the armed forces from the east front of the Capitol.
Reuters on the protests:
Black-clad activists angry about U.S. President Donald Trump's inauguration smashed store and car windows in Washington on Friday and fought with police in riot gear who responded with pepper spray and stun grenades.
About 500 people, some wearing masks and kerchiefs over their faces, marched through the city's downtown, breaking the windows of a Bank of America branch, a McDonald's outlet and a Starbucks shop, all symbols of the American capitalist system.
The crowd chanted anti-Trump slogans and carried at least one sign reading "Make Racists Afraid Again," a play on the New York businessman-turned-politician's "Make America Great Again" campaign slogan.
They also vandalized several cars and hurled trash cans and newspaper vending boxes into the streets before being largely dispersed by police about 90 minutes before Trump was sworn in at the Capitol a mile and a half (2.4 km) away.
"The message I want to send is that Trump does not represent this country. He represents the corporate interests," said Jessica Reznicek, a 35-year-old Catholic aid worker from Des Moines, Iowa, who was part of the protest but did not participate in the violence.
Barack Obama has taken off in a Marine helicopter from the east front of the Capitol as the country's ex-president.
The Obamas are reportedly headed to California initially, but have bought a home in Washington where they plan to remain with their younger daughter still in school.
With Trump sworn in, outgoing President Barack Obama and his family are issuing farewells and departing from the east front of the Capitol.