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Around 200 guests are invited to the lunch, which will include speeches and gifts from the Congressional Inaugural Committee.
The tradition dates back to 1897 when the Senate Committee on Arrangements hosted a lunch at the Capitol for William McKinley, the 25th President of the United States.
He is both the youngest and first openly-gay person to deliver the inauguration poem.
President Obama's youngest daughter Sasha was clearly not especially captivated by her father's inaugural speech.
President Barack Obama is giving is inaugural speech on the theme of 'faith in America's future'. Read more about the theme here.
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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.