United States President Barack Obama, right, First Lady Michelle Obama, left center, and Prime Minister Justin Trudeau of Canada, right center, and and Mrs. Sophie Gr&eacute;goire Trudeau, left,  pose for the official photo on the Grand Staircase of the White House March 10, 2016 in Washington,D.C. <br /> Credit: Olivier Douliery / Pool via CNP
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