Kevin Warsh has been sworn in as the new head of the Federal Reserve, marking a new chapter after a strained relationship between the world's most powerful central bank and US President Donald Trump.
Speaking after taking the oath of office at the White House, Warsh pledged to be "reform-oriented," saying he would carry out his duties with "energy and purpose".
He said the coming years could "bring unmatched prosperity that will raise living standards for Americans from all walks of life".
