Donald Trump has been sworn in as the 47th US president in an inauguration ceremony that combined grand tradition and moments of intimacy.
Here are some of the most striking images from the day.
Last minute change of plan
The ceremony usually takes place on a specially built stage in front of the US Capitol building, with VIP guests on the platform and thousands watching from the Mall.
But a forecast of freezing temperatures with a wind chill of -13C (9F) prompted a decision to move the ceremony inside the Capitol building's Rotunda.
Trump supporters who had travelled to the capital to see the ceremony have flocked to the Capital One arena to watch it streamed live on big screens.
Church service
Trump spent the night before the inauguration at Blair House, just across Pennsylvania Avenue from the White House, as is tradition for incoming presidents.
Trump, his wife Melania, and incoming Vice-President JD Vance and his wife Usha attended a church service at St John’s Episcopal Church.
Rotunda ceremony
Guests at the inauguration ceremony in the Rotunda of the Capitol building included former presidents, foreign dignitaries, Trump's family and his picks for his new administration.
Image source, Julia Demaree Nikhinson/AFP
Donald Trump is sworn in as the 47th US President, image
Trump took the oath, before celebrating with his family.
Image source, Julia Demaree Nikhinson/AFP
Donald Trump is sworn in as the 47th US President, image
Image source, Chip Somodevilla/Pool/EPA
In his inaugural address, Trump detailed a string of plans for his presidency including tackling immigration, taking control of the Panama Canal and planting the stars and stripes on Mars.
Image source, Julia Demaree Nikhinson/AFP
Donald Trump is sworn in as the 47th US President, image
Trump took the oath, before celebrating with his family.
Image source, Julia Demaree Nikhinson/AFP
Donald Trump is sworn in as the 47th US President, image
Image source, Chip Somodevilla/Pool/EPA
In his inaugural address, Trump detailed a string of plans for his presidency including tackling immigration, taking control of the Panama Canal and planting the stars and stripes on Mars.
Public reaction
Trump supporters at the Capital One arena were jubilant, cheering as they followed the songs, ceremony and speeches. But elsewhere, people marched in protest at the prospect of four years of Trump in power.
Oval Office return
Once the ceremony was over, Trump began his presidency by signing a flurry of executive actions, including starting the process of withdrawing the US from the World Health Organization and declaring a national emergency at the US-Mexico border.
He also issued nearly 1,600 pardons in connection with the Capitol riots on 6 January 2021.
Inaugural balls
The president and vice-president rounded off the day by attending a series of balls – the Commander-in-Chief Ball, the Liberty Inaugural Ball and the Starlight Ball.