People work in San Diego, California, at the construction site of prototypes for President Donald Trump's border wall with Mexico, in this picture taken from the Mexican side of the border in Tijuana, Mexico October 3, 2017. REUTERS/Jorge Duenes

People work in San Diego, California, at the construction site of prototypes for President Donald Trump's border wall with Mexico, in this picture taken from the Mexican side of the border in Tijuana, Mexico October 3, 2017. REUTERS/Jorge Duenes

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