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US President Donald Trump speaks to the staff at the Department of Homeland Security in Washington, DC, on January 25, 2017.
Trump vowed to restore "control" of US frontiers as he moved Wednesday to fulfil his pledge to "build a wall" on the Mexican border, signing two immigration-related decrees and sounding a hardline tone. / AFP / NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
US President Donald Trump speaks to the staff at the Department of Homeland Security in Washington, DC, on January 25, 2017.
Trump vowed to restore "control" of US frontiers as he moved Wednesday to fulfil his pledge to "build a wall" on the Mexican border, signing two immigration-related decrees and sounding a hardline tone. / AFP / NICHOLAS KAMM        (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)

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