The big challenge for US President Joe Biden. The BBC's North America editor, John Soppel, wrote that Joe Biden seemed to be walking on a rope when he took the oath of office.

He wanted to deny Donald Trump and Trumpism. However, he never mentioned his name. Instead, he seemed to want to reach out to Trump supporters. He told them that he would serve as president of all Americans.

Joe Biden says he wants an end to the "rough war."

But think about what Biden needs to do when he goes to the White House. He has to deal with this huge problem in a country where America is bitterly divided, where there is a competition between truth and falsehood.

How will he unite the whole country?

Joe Biden has been sworn in as the 46th President of the United States. U.S. Chief Justice John Roberts administered the oath to him. He took the oath of office at 11 a.m. local time on Wednesday at the Capitol in Washington.

This is a day of democracy," he said in a speech after taking the oath. The day is American. The day is a day of history and hope.

He said the United States has had to test at various times, its country is facing challenges. Today we are celebrating the victory of democracy.

The swearing-in ceremony was not attended by the recently departed President Donald Trump. For the first time in the 150-year history of the United States, no outgoing president attended the inauguration of a new president.