LIVE UPDATE: The inauguration of Donald Trump as the 45th U.S. president

A White House press pool report notes one more moment from Obama’s procession just then down the colonnade:

Obama asked reporters “how’s it going?” Reporters asked Obama if he felt nostalgic. “Of course,” he replied.

There’s some of that in the air today.

US President Barack Obama departs the Oval Office for the last time as president Photograph: Jim Watson/AFP/Getty Images

Not my president’

4m ago14:33

The Trumps have just left church and hopped in a car. Next stop: White House.

5m ago14:32

Barack Obama has just left the Oval Office for the last time as president, presumably having left a letter for Trump inside on the Resolute desk. Reporters called out as Obama walked down the West Wing colonnade.

9m ago14:28

Shepard Fairey, the artist who created the original Obama “Hope” poster, has done a new series titled We the People – check it out at Mic.com. The Washington Post has printed one entry on the back of today’s A section – for use at the inauguration?

13m ago14:25

We now have a roving live video stream of the Inauguration proceedings atop the blog. Soon we should be seeing the Trumps leaving church to head to the White House. Meanwhile there’s footage of the crowd on the National Mall.

15m ago14:22

Obama: ‘I’m still asking you to believe’

President (still for about the time it takes to watch a feature-length film) Obama is tweeting some farewell notes.

@potus is about to change.

I won’t stop; I’ll be right there with you as a citizen, inspired by your voices of truth and justice, good humor, and love.

11s ago14:18

Someone in New York City has unfurled a banner on the 59th St Bridge reading “Bridges not walls”:

2m ago14:16

Dan Scavino, Trump’s social media director, is in church with him. Tweeting in church!

27m ago13:39

People have been tweeting pictures of the Trumps leaving the building. They are now on their way to the church in a large convoy of black cars.

31m ago13:35

Donald and Melania Trump, who was wearing a light blue outfit that TV anchors compared to the style of Jackie Kennedy, are leaving Blair House in Washington and getting into a large black car. Trump was wearing a long black coat and red tie.

37m ago13:29

Vice-president-elect Mike Pence has arrived at St John’s Church for the service that the Trumps will also attend, MSNBC reports.

39m ago13:28

About 28,000 security personnel, kilometres of fencing, roadblocks, street barricades and dump trucks laden with sand are part of the security cordon about eight square kilometres of central Washington, AP reports.