Trump inauguration live updates: Highlights from Trump's inaugural speech and swearing in

With a sea of red hats and the campaign soundtrack blasting, Capital One Arena emulates the environment of a campaign rally.

Notably, a desk sits at the end of the stage across the podium. Trump is expected to sign executive orders from here.

There is a feed of Trump's movements being streamed live on the Jumbotrons as well. As the president-elect departed St. John's church, the crowd here burst into applause and chanted "USA."

There were also chants of "JD-48" as they watched the vice president-elect and his wife arrived at the White House.

ABC News Senior Political Correspondent Rachel Scott spoke to one couple from Alabama who arrived at 2:30 a.m. and said there were still "thousands" of people ahead of them.

EMS first responders from Butler, Pennsylvania -- the site of that first assassination attempt -- are expected to be present as well.

-- ABC News' Rachel Scott and Benjamin Siegel

According to the presidential inauguration committee, here is what will happen when Trump gets to the Capitol:

First, he will be sworn in around noon.

After, Trump will bid farewell to President Joe Biden and Vice President Kamala Harris. Biden is leaving the Capitol via helicopter to go to Joint Base Andrews, where he will hold a farewell event with his staff.

Trump will then visit the overflow crowd gathered at Emancipation Hall to watch the swearing in and later participate in a ceremony in the presidents signing room. He will eventually return to Emancipation Hall for a review of the troops.

President Joe Biden and President-elect Trump are riding together to the U.S. Capitol for Trump's swearing-in.

Democratic Sen. Amy Klobuchar walked them out of the White House.

First lady Jill Biden and Melania Trump rode to the ceremony separately, as did Vice President Kamala Harris and Vice President-elect JD Vance.

As President Joe Biden prepared to pass the baton to President-elect Donald Trump, he's followed the tradition of leaving his successor a note.

While Biden confirmed that he wrote Trump a letter, he did not say what his message was.

President Ronald Reagan started the ritual of leaving his successor a letter in 1989. Every president since has taken part in the tradition. But since Reagan's letter to Bush, each handover has been from a Democrat to a Republican or vice versa.