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U.S. President Barack Obama, from right, U.S. President-elect Donald Trump, U.S. First Lady-elect Melania Trump, and U.S. First Lady Michelle Obama stand for a photograph outside of the White House ahead of the 58th presidential inauguration in Washington, D.C., U.S., on Friday, Jan. 20, 2017. Trump will become the 45th president of the United States today, in a celebration of American unity for a country that is anything but unified. Photographer: TKTK/Pool via Bloomberg. Photographer: Kevin Dietsch/Pool via Bloomberg