presidential blunders

The flub displayed by Barack Obama and Chief Justice John Roberts isn't the first and likely won't be the last. Article Two of the U.S. Constitution says, "Before he enter on the execution of his office, he shall take the following oath or affirmation: I do solemnly swear (or affirm) that I will faithfully execute the office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States." Here's a look at other oath miscues.

• 1909: As remembered by President William Taft, Chief Justice Melville Fuller made a minor error when administering the oath.
• 1929: Administering the oath to Herbert Hoover, Chief Justice William Taft said "preserve, maintain and defend" instead of "preserve, protect and defend."
• 1965: Administering the oath to Lyndon Johnson, Chief Justice Earl Warren said, "office of the Presidency" instead of "office of the president." (Hear the sound clip below.)
  

To date, the oath has been taken a total of 72 times by 43 people due to multiple terms, miscues and inauguration day falling on a Sunday.