Mark Zuckerberg has said immigration is "one of the biggest civil rights issues of our time".
The Facebook CEO spoke out about the "heartbreaking" plight of immigrant children in an interview with ABC.
Zuckerberg, 29, is calling for a reform of immigration laws and has launched a campaign to push for changes.
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He told ABC: "The future of our economy is a knowledge economy.
"And that means that getting the most talented people into this country is the most important thing that we can do to make sure that the companies of tomorrow are founded here.”