21 January 2013
Last updated at 21:32
Hundreds of thousands of people from around the world, including these Maryland university students gathered in Washington to see President Obama sworn in for his second term of office. In his second inaugural address, he said a decade of war was ending, and economic recovery had begun.
Those in Washington took to social media to document their experiences. Massachusetts student and Twitter user @Hannahradner said the atmosphere was very crowded, jubilant and busy.
Security was paramount at the event which saw President Obama's supporters crammed together for the ceremony on the National Mall.
Louis Velarde from Bolivia took this image of a very busy Barack Obama impersonator near the event in Washington DC.
Dave Beam said he and his wife Emily live in Washington DC with their cat, Tortellini, and both work for the federal government. Unfortunately Tortellini - who is not a fan of crowds - could not make it to the inauguration.
Emery Younger: "I viewed the ceremony from the ticketed standing section in front I the mall. The entire crowd was ecstatic and there was a real sense of patriotism. The crowd was clearly very liberal and many members of the crowd booed when Paul Ryan and Newt Gingrich entered the stage."
Briton Stefan Pryce and his friend Ryan proudly waved their flags in the Smithsonian area of the National Mall in Washington DC as they waited for the inauguration to begin.
Barack Obama told the American people to "seize the moment" during his second inaugural speech.
In a roughly 18-minute, 2,100-word speech, Mr Obama called for "collective action" to preserve American freedom, which he linked to social and economic equality. You can send your photos to email@example.com. For terms and conditions visit bbc.co.uk/terms