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Mary Francis Knight, 51, of Reston, Virginia
Mary Francis Knight, 51, of Reston, Virginia

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    Family of Navy Yard victim grieves

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Family of Navy Yard victim grieves

The brother-in-law of Navy Yard victim Mary Francis Knight tells Erin Burnett how the family is coping with their loss.

Family of Navy Yard victim grieves

The brother-in-law of Navy Yard victim Mary Francis Knight tells Erin Burnett how the family is coping with their loss.