Published January 15. 2013 4:00AM Updated January 15. 2013 1:16PM
Jimmy Greene, left, and Nelba Marquez-Greene, center, parents of Sandy Hook Elementary School shooting victim Ana Marquez-Greene, and Nicole Hockley, right, mother of victim Dylan Hockley, attend a news conference at Edmond Town Hall in Newtown on Monday. The grieving parents and family members of those killed in the massacre gathered to help begin a campaign aimed at preventing the kind of bloodshed that has turned their town into a national symbol of grief.