Mark Zuckerberg grilled by Senate on data privacy, global influence and past mistakes

Facebook CEO Mark Zuckerberg took heat from the U.S. Senate on Tuesday, in the first of two days of congressional hearings on privacy, election interference and a range of other issues, stemming from the Cambridge Analytica scandal. Zuckerberg, founder of one of the internet's most dominant companies, apologized and tried to convey that his company is changing. Lisa Desjardins reports.

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