Trump Supporters, Opponents Clash on Inauguration Eve

Pro Trump flags were being flown around Washington, D.C., Jan. 19, 2017.

A supporter of President-elect Donald Trump near the White House, Jan. 19, 2017.

Near the White House, people were taking their pictures with a Trump supporter's truck in the background, Jan. 19, 2017.

Protesters outside the National Press Club in Washington, D.C., hold signs saying No Trump, No KKK, No Fascist USA on the eve of the inauguration of President-elect Donald Trump, Jan. 19, 2017.

Outside the National Press Club in Washington, D.C., a young woman holds an anti-Trump protest sign, Jan. 19, 2017.

Some people were injured in a clash between protesters supporting President-elect Donald Trump and those opposing him. Some Trump hats were burned in protest.