December 21, 2012 Sandy Hook and other mass killings have left people wondering how someone could engage in such behavior. Scientists say that genes can indeed predispose a person to mental illness or violence. But genetic variants alone can't explain why someone commits mass murder.
December 21, 2012 National Rifle Association officials say armed officers need to be put in every school. They were reacting to last Friday's mass shooting in Newtown, Conn.
December 21, 2012 Over the years, the National Rifle Association has become synonymous with protection of gun owners' rights. But other groups have taken an even stronger line in defense of Second Amendment protections. On Friday, the NRA echoed some of those groups, calling for "qualified armed security" in all schools.
December 21, 2012 One week ago, 20 children and six adults were killed at Sandy Hook Elementary School. Also today: The National Rifle Association holds a news conference; President Obama says hundreds of thousands have signed petition seeking "serious steps" to end gun violence. and the first lady writes to Newtown.
December 20, 2012 After NBC News' Ann Curry tweeted the idea — to do one act of kindness in memory of each person murdered at Sandy Hook Elementary School — it took off. You can see what others are doing, and share your story, by following #26Acts.
December 19, 2012 When the students of Sandy Hook Elementary return to class after the holiday break, they'll be attending a different school. They'll also have a principal who will be a familiar face to some: Donna Page, who retired from Sandy Hook two years ago.
December 19, 2012 Family and Friends celebrate the lives of Victoria, Daniel, Caroline and Charlotte, recalling how each of them could light up a room. The teacher and three students were killed in the school shooting in Newtown on Friday.
December 19, 2012 First responders are trained to rescue, help and save. In Newtown, Conn., many of the police officers, firefighters and EMTs who rushed to Sandy Hook Elementary School last week are struggling to cope with the fact that there was little they could do to help.
December 19, 2012 In the aftermath of tragic events like the school shooting in Newtown, Conn., people often question why an all-powerful God would allow such evil to happen. Throughout human history, different faiths have attempted to reconcile belief in a benevolent God with the inevitability of human suffering.
December 19, 2012 Proponents make the case that shootings such as Friday's in Newtown, Conn., could be prevented or stopped if teachers with permits to carry concealed weapons could bring their handguns to school.