Thousands of people gathered in Washington DC today to see Barack Obama publicly sworn in as president.
Obama was the first president to use the inauguration address to speak about gay rights.
ITV News' Washington Correspondent Robert Moore reports:
Beyonce "lip-synched" the national anthem at President Obama's inauguration because she did not have time to rehearse with the band.
A day of grand political theatre lies ahead, but President Obama knows his history and will be steeling himself for a turbulent second term.
Presidential inaugurations are normally highly scripted events, but things don't always go according to plan.