Obama honours Martin Luther King
Americans are marking the annual public holiday in memory of black civil rights leader Martin Luther King - on the eve of Barack Obama's inauguration.
The US president-elect will spend the day attending community projects in Washington in memory of Dr King, who was assassinated in 1968.
Mr Obama told hundreds of thousands at a rally on Sunday that "the dream of our founders will live on in our time".
Washington is braced for unprecedented crowds for Tuesday's inauguration.
More than two million people are expected to attend the historic event.
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The US president-elect will spend the day attending community projects in Washington in memory of Dr King, who was assassinated in 1968.
Mr Obama told hundreds of thousands at a rally on Sunday that "the dream of our founders will live on in our time".
Washington is braced for unprecedented crowds for Tuesday's inauguration.
More than two million people are expected to attend the historic event.