Newtown families make promise for change

Aired: 12/12/2013 | 0:09:31 | Clip
One year after the massacre at the Sandy Hook Elementary School in Newtown, Ct., parents of the young victims are struggling to make sense from a senseless act of violence. Hari Sreenivasan talks to two families who lost children in the shooting about their advocacy to prevent more tragic murders with the Sandy Hook Promise.