We look at Inauguration Day in a locked-down Washington, DC with thousands of troops securing the US capital.
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Biden takes over from Donald Trump at a moment of deep division in the United States, which is reeling from COVID-19.
Al Jazeera takes a side-by-side look at the inaugurations of the two most recent presidents of the US.
The 46th US president urged unity, asking Americans to ‘start afresh’ and to ‘begin to listen to one another again’.