World Leaders Offer President Biden Words of Welcome .
Joe Biden has been sworn in as the 46th President of the United States.
Leaders around the world have reacted to the historic event.
This new dawn in America is the moment we've been waiting for so long.
Europe is ready for a new start with our oldest and most trusted partner, European Commission President Ursula von der Leyen.
If the new US administration can adopt a more rational and responsible attitude in formulating its foreign policy, I think it will be warmly welcomed by everyone in the international community, Foreign ministry spokeswoman Hua Chunying.
The ball is in the US' court now.
If Washington returns to Iran's 2015 nuclear deal, we will also fully respect our commitments under the pact, Iran President Hassan Rouhani.
I am relieved that Joe Biden is sworn in as President today and coming into the White House.
I know that this feeling is shared by many people in Germany, German President Frank-Walter Steinmeier.
In our fight against Covid and across climate change, defence, security and in promoting and defending democracy, our goals are the same and our nations will work hand in hand to achieve them, British Prime Minister Boris Johnson
