After a norm-shattering election campaign, Donald Trump's inauguration represented another departure from tradition.
The swearing-in ceremony took place in the rotunda of the US Capitol. Dangerously cold conditions meant the inauguration took place indoors.
The new president is expected to sign a pile of executive orders on his first day, on policies ranging from immigration to TikTok. He's said he may also pardon people involved in the January 6, 2021, insurrection at the US Capitol.
Follow the day's events in our live blog.
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