Joe Biden's presidential inauguration ceremony has begun

Biden swears the oath of office at noon Wednesday, becoming the 46th president of the United States. The Democrat is preparing to take the helm of a deeply divided nation and inherit crises arguably greater than any faced by his predecessors.

History will be made at Biden's side, as Kamala Harris becomes the first woman to be vice president.

The ceremony in which presidential power is transferred is a hallowed American democratic tradition. And this time it serves as a jarring reminder of the challenges Biden faces: The inauguration unfolds at a US Capitol battered by an insurrectionist siege just two weeks ago, encircled by security forces. It's devoid of crowds because of the threat of the coronavirus pandemic.

Flouting tradition, Donald Trump departed Washington on Wednesday morning ahead of the inauguration rather than accompany his successor to the Capitol.

Former Presidents George W. Bush, Barack Obama and Bill Clinton are attending.

The other living former president, 96-year-old Jimmy Carter, previously announced he would not attend.