Nicole Hockley, Co-Founder of Sandy Hook Promise, On Honoring Victims of School Shootings

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Chris and Lynn McDonnell react with grief after learning their daughter Grace was killed by a gunman at Sandy Hook Elementary School in Newtown, Connecticut, Friday, December 14, 2012.
( Ted Shaffrey / AP Photo )
Produced by Meg Dalton
GBH PRX WNYC Studios