Big Day USA!
Millions of people are gathering in the US capital to see Barack Obama sworn in as America’s 44th president – and its first African-American leader.
Huge crowds are expected to pack Washington’s National Mall as Mr Obama takes the oath of office at exactly 1200 (1700 GMT).
Unprecedented security is in place, with 40,000 security personnel either on duty or stand-by in the city.
Across the US, there is a sense of history being made, correspondents say.
The roar of approval that will greet Barack Obama when he takes the oath of office will be genuine, heartfelt and will come from all corners of America.