Framed, Chapter 1: She was the PTA mom everyone knew. Who would want to harm her?

Facebook CEO Mark Zuckerberg speaks at the Mobile World Congress in Barcelona.

Mark Zuckerberg, fresh off his empire-building move to buy popular mobile messaging company WhatsApp for $19 billion, took the stage at the largest mobile conference to talk up his vision for connecting billions more people.
Alberto Estevez / EPA
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