President Obama just became the 16th President to take the oath of office for the second time.  There have been 57 inaugurations.

Josh Gerstein commented on Politico

Barack Obama and John Roberts were all smiles when the chief justice swore in  the president on Sunday — and they’ll likely repeat the performance on  Monday.

But the serene tableau obscures the tumultuous relationship between the two  men since their first awkward public interaction during the botched oath of  office four years ago.

On Sunday, Roberts read the oath from a piece of paper — and both men seemed  relieved when it was over. They exchanged congratulations and thanks, and then  Obama turned to his daughter Sasha. “I did it,” he told her.

Vice President Joe Biden was sworn in earlier by Justice Sotomayor.

Obama Photograph AP

Biden photograph Carolyn Kaster/AP

Related articles

• The Presidential Oath: Not Always Perfect, But It Gets The Job Done (npr.org)
• Biden Sworn In: Vice President Takes Oath Of Office (huffingtonpost.com)
• Joe Biden sworn in as vice-president as Obama inauguration begins (guardian.co.uk)