US President-elect Joe Biden has begun the transfer of power Americans hope will turn the page on four years of divisiveness, as his defeated rival Donald Trump refuses to concede and continues to cast doubt on the election results.
As congratulations poured in from world leaders and supporters nursed hangovers after a day of raucous celebrations, 77-year-old President-elect Biden and Vice President-elect Kamala Harris, 56, launched a transition website, BuildBackBetter.com, and a Twitter feed, @Transition46.
