Donald Trump officially became the president of the United States on Jan. 20.
Here are the day's most captivating images, from the Obama family welcoming the Trumps to the White House to the violent protests in the streets of Washington.
This story will be updated with more images as the day progresses.
President Trump and Melania Trump attend church service
Donald and Melania Trump leave church on the morning of the inauguration.
Trump supporters descend onto the National Mall
Thousands of supporters gather in the National Mall to cheer on the new president.
Former President Obama shares a final White House moment
As he waits for his successor to arrive at the White House, Former President Obama kisses his wife Michelle.
The Obamas welcome the Trumps to the White House
The incoming and outgoing first families meet at the White House before the inauguration ceremony.
Changing of the Commander
Former President Obama leaves the White House for the last time as Commander in Chief. President Trump accompanies him on the walk to the presidential limousine.
Protests erupt in Washington
Police drag a protester away from 14th Street NW in Washington. As of this writing, CNBC reports that at least 95 arrests have been made by law enforcement in response to the protests.
Inaugural arrival
Melania Trump enters her husband's inauguration ceremony, as she gets set to become the first lady of the United States.
Trump's children arrive
Ivanka Trump, Tiffany Trump, Eric Trump and Donald Trump Jr. enter the inauguration ceremony for their father.
The Clintons arrive
Hillary Clinton, the former presidential candidate and Democratic rival of President Trump, arrives with former President Bill Clinton.
Melania Trump
Joe Biden greets Melania Trump at the inauguration ceremony outside of the U.S. Capitol.
Former first lady Michelle Obama arrives with Jill Biden
Michelle Obama and Jill Biden arrive at the Capitol together.
Outgoing president and vice president arrive
Obama and Biden enter the Capitol for the last time as sitting president and vice president.
Donald Trump arrives
Trump enters the stage at the inauguration ceremony.
Vice President Mike Pence takes the Oath of Office
Mike Pence takes the Oath of Office, becoming the vice president of the United States.
President Trump takes the Oath of Office
Donald Trump takes the Oath of Office, becoming the president of the United States.
Presidential fist pump
President Trump raises his fist in celebration of his inauguration.
Inaugural address
President Trump gives his inaugural address on the West Front of the U.S. Capitol.
Inaugural address to the nation
Another shot of President Trump delivering his inaugural address, promising to put "America first."
The president
President Trump faces the crowd, celebrating his inauguration.
The new administration
Melania Trump, Donald Trump, Mike Pence and Karen Pence wave goodbye to Barack and Michelle Obama as the couple departs the Capitol.
Protests erupt
Police officers pepper spray anti-Trump protesters before the inauguration.
The Trumps and Obamas
Two presidents and two first ladies watch the inauguration activities unfold at the U.S. Capitol.
BFF goodbyes
The Obama and Biden families say goodbye before departing from the U.S. Capitol.
Former President Obama departs
The former president boards the presidential helicopter, departing the U.S. Capitol. As Obama is no longer the sitting president, the aircraft no longer receives the "Marine One" call sign reserved for helicopters carrying the sitting president of the United States.
Setting fire
Protesters set fires in the streets of Washington following President Trump's inauguration.