Tech giants invoke American dream to defend their power

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Hill is getting underway this hour. Or from correspondent Alex Porsches chief executives for the world's biggest tech companies preparing to appear on Capitol Hill for historic antitrust hearing. Amazon's Jeff Bezos, Facebook's Mark Zuckerberg, Apple's Tim Cook and Google Sundar Pichai, a group that includes two of the world's richest men. They're expected to face questions over whether the size of their companies stifle competition. Amazon is under scrutiny for its use of cellar data Apple over its APP store policies, Facebook for its acquisition strategy and its dominance in online advertising. And Google for its own practices in search and advertising. Companies are expected to argue that they have helped countless entrepreneurs and small businesses and made America's leader in innovation and amid rising competition from China. Some members of

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