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Watched by Homeland Security Secretary Kirstjen Nielsen (L) and Vice President Mike Pence, US President Donald Trump signs an executive order on immigration in the Oval Office of the White House on June 20, 2018 in Washington, DC. - US President Donald Trump on Wednesday signed an executive order aimed at putting an end to the controversial separation of migrant families at the border, reversing a harsh practice that had earned international scorn."It's about keeping families together," Trump said at the signing ceremony. "I did not like the sight of families being separated," he added. (Provided via MANDEL NGAN/AFP/Getty Images)