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When will America address the gun violence epidemic?

This week, 58 people were killed when a gunman opened fire on a crowd of concertgoers in Las Vegas. How do we make sense of another senseless tragedy? NBC's Harry Smith has this week's Sunday Closer.
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/ Source: TODAY

This week, 58 people were killed when a gunman opened fire on a crowd of concertgoers in Las Vegas. How do we make sense of another senseless tragedy? NBC’s Harry Smith has this week’s Sunday Closer.