Donald Trump sworn in as 47th president of the United States

Donald Trump has taken the oath of office and officially become the 47th president of the United States. For the first time in 40 years the inauguration ceremony was held indoors, in the Capitol Rotunda, because of severe frost in Washington.

In his inaugural address Trump proclaimed the start of a "golden age of America", promised to declare a national emergency on the border with Mexico and to tighten migration policy.

On his first day the president signed dozens of executive orders, including on withdrawing the US from the Paris climate agreement and the World Health Organization.

JD Vance became vice president. The heads of the largest technology companies attended the ceremony.