Donald Trump will be sworn in for a historic second term as US president today, promising a new "golden age" for America as the world braces for a return of his unpredictable leadership.
The Republican vowed to unleash a blitz of executive orders undoing Joe Biden's legacy upon his return to the White House, and to launch immediate deportations of undocumented migrants.
If Trump painted a dystopian picture of "American carnage" at his first inauguration in 2017, this time around he is offering a more upbeat promise of a "brand new day" for the United States.