Flowers, candles and stuffed animals at a makeshift memorial in Newtown, Conn., the week after 20 children and 6 adults were killed at Sandy Hook Elementary School. Eric Thayer/Reuters/Landov hide caption

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Ian and Nicole Hockley are parents of Dylan Hockley, one of 20 first-graders killed at Sandy Hook Elementary last year. Nicole helps lead Sandy Hook Promise, a nonprofit seeking to prevent the causes of gun violence. John Moore/Getty Images hide caption

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Jimmy Greene holds a picture of his daughter, Ana, as he kisses his wife Nelba Márquez-Greene, at a January news conference in Newtown, Conn. They try to remember the good days with their daughter. "It is what brings me great comfort and great joy," Márquez-Greene says. Jessica Hill/AP hide caption

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A crime scene photo provided by the Connecticut State Police shows a rifle in the master bedroom in Adam Lanza's house. Handout/Getty Images hide caption

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Avielle's artwork hangs on the walls and windows of Jeremy Richman and Jennifer Hensel's home. Craig Ruttle/AP hide caption

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Erica Lafferty (right), daughter of Sandy Hook Elementary School shooting victim Dawn Hochsprung, consoles Carlee Soto, sister of victim Victoria Soto, after representatives of 14 families addressed the media on Monday in Newtown, Conn. Jessica Hill/AP hide caption

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Connecticut State Police walk near the scene of the Sandy Hook Elementary School shooting on Dec. 14, 2012, in Newtown. Douglas Healey/Getty Images hide caption

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An image from a Connecticut State Police report on the shootings at Sandy Hook Elementary School shows a scene at 36 Yogananda St. in Newtown, Conn., where Adam Lanza killed his mother before driving to the school and killing 26 students and staff last December. AP hide caption

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In June, people gathered in Newtown, Conn., to remember the massacre at Sandy Hook Elementary School. Spencer Platt/Getty Images hide caption

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Voters in Newtown, Conn., have approved a plan to use nearly $50 million in state funds to demolish Sandy Hook Elementary and build a new school in its place. This photo provided by Craig Hoekenga shows his son Trey, a kindergarten student at Sandy Hook, on the school bus this year. The window has a quote from the late principal, Dawn Hochsprung, who was killed in last December's mass shooting. Craig Hoekenga/AP hide caption

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