Will Big Data and Big Money Mean Big Trouble?

It’s "the Year of Big Data." What is it? What are the benefits and the dangers? Why are numerous federal agencies about to begin a major research initiative on big data? Also, can the international community heal a fractured Syrian opposition? On Reporter's Notebook, did Trayvon Martin or George Zimmerman call for help? As public reaction continues, we hear about voice analysis of a cry for help.

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