Here's a reminder of the text of the oath of office that U.S. presidents take on their inauguration. The text of the U.S. presidential oath of office is enshrined in the U.S. Constitution. It is administered by the chief justice of the U.S. Supreme Court, and reads as follows:
I, [FULL NAME], 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. So help me God.
Trump will be sworn in with his hand on a family Bible and the so-called "Lincoln Bible" (which was also used by Barack Obama).
Black-clad activists protesting U.S. President-elect Donald Trump's inauguration have smashed a plate-glass window at a Starbucks in Washington.
Our correspondent Mike Eckel has some photos of policemen in riot gear at Franklin Square Park.
Within less than an hour, there should be six living current or former U.S. presidents:
* 45th President Donald J. Trump
* 44th President Barack Obama
* 43rd President George W. Bush
* 42nd President Bill Clinton
* 41st President George H.W. Bush (not in attendance due to illness)
* 39th President Jimmy Carter
Ivanka Trump and Trump's four other children, Tiffany, Donald Jr., Eric, and 10-year-old Barron, are at the Capitol, heading out to the ceremony.
Outgoing Vice President Joseph Biden and Vice President-elect Mike Pence are also inside the Capitol.
President Obama and President-elect Trump are inside the Capitol Building.
CNN commentator notes that Hillary Clinton is wearing white, "the color of the suffragette movement."