It was about three hours into Facebook CEO Mark Zuckerberg’s testimony to the House Energy and Commerce Committee on Wednesday, when all of the attention quickly shifted from Zuckerberg’s glistening brow to the exhibit looming over Missouri Republican Billy Long's head. "Who are they?" Long asked, referring to the two women whose larger-than-life faces filled the giant poster board. Zuckerberg paused, before offering, almost in question, "I believe.

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