Joe Biden has been sworn in as the 46th US president, ending one of the most dramatic political transitions in American history. Please subscribe HERE http://bit.ly/1rbfUog
"Democracy has prevailed," he said after taking the oath of office from Chief Justice John Roberts.
Donald Trump – who has not formally conceded the presidency to Mr Biden – snubbed the inauguration ceremony, in a departure from longstanding precedent.
The new president has announced a raft of measures reversing Trump policies.
Kamala Harris was sworn in as vice-president ahead of Mr Biden. She is the first woman – and the first black and Asian-American person – to serve in the role, a heartbeat from the presidency.
Newsnight’s US Correspondent David Grossman reports.
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