Watch Raising Adam Lanza on PBS. See more from FRONTLINE.

How do you make sense of a seemingly senseless act of violence? How do you help the country begin to process the trauma of 20 small children shot dead in their classroom?

The Hartford Courant and Frontline are piecing together the lives of Nancy Lanza and her son Adam, who killed his mother and 26 first-graders, school officials and teachers during the massacre at Sandy Hook Elementary School in December.

Adam attended Sandy Hook as a first-grader, but his mother pulled him out of the school and several other schools over the course of his childhood.

In addition to Asperger’s syndrome, Adam from an early age also had sensory integration disorder, which left him unable to handle loud noises, pain and crowds, but is not a universally accepted medical diagnosis.

As a child, Adam got upset when others gave him a high-five or a pat on the back. It saddened his mother, Nancy, who didn’t know how to help him.

Andrew Julien, editor of The Hartford Courant, points out: “Nancy Lanza is the person Adam was closest to in the world. She was the first person he killed. He shot her four times in the head while she was in bed, and then he went off to Sandy Hook Elementary School. If we can begin to understand Adam’s relationship with Nancy, we probably can begin to understand Adam.”

Part one, Raising Adam Lanza, draws on Nancy’s own emails, previously unseen photos and exclusive home video footage of Adam, as well as insider interviews, to reveal a mother’s complex relationship with her troubled young son. Part two, Newtown Divided follows Courant reporter Matt Kauffman as he explores the consequences of the shooting in a town that has a long history of firearms and gun ownership, and where people most deeply affected by the tragedy are wrestling with our nation’s gun culture and laws.

The hacktivist collective Anonymous has released what it claims to be a cache of personal details of members of the Westboro Baptist Church, after members of the extremist religious group said on Twitter that they would picket Sandy Hook Elementary School in Newtown, Connecticut, the scene of a mass shooting where 26 children and adults were killed on Friday.

Supporters of Anonymous appeared to have taken down the extremist group’s website, most likely through a distributed denial of service, or DDoS attack. They also posted a YouTube video (above) threatening to “destroy” the group.

Westboro is a small extremist group based in Topeka, Kansas, notorious for picketing the funerals of soldiers and victims of shootings with signs and banners claiming tragic events are God’s punishment for the existence of homosexuality.

A document posted on Pastebin claims to reveal physical addresses of the group’s founding Phelps family, telephone numbers, even a social security number, and background information on the group. It's unclear how public these personal details already were for Westboro’s members, given their controversial activities.

A representative of Westboro, believed to be its regular spokeswoman Shirley Phelps-Roper, also carried out a Reddit IAmA, or “Ask Me Anything,” earlier Sunday under the nickname GodSentCTShooter, not surprisingly meeting few questions and plenty of irritation from Redditors.

This isn’t the first time Westboro and Anonymous have clashed. In February 2011 a supporter of Anonymous took part in a radio debate with Shirley Phelps-Roper, during which a small group of hackers surprised Roper by taking down several parts of Westboro’s site during the show.

People pray and stand outside the overflow area of a vigil at the Saint Rose of Lima church in Newtown, Connecticut. Photo: Reuters

Have you wondered where on earth people go to purchase these guns that are so powerful that they can leave a town, and a nation so devastated that churches have standing room only? Cause young people to drop down on their knees in prayer wherever there's room?

Of course, there are gun stores. But it's as simple as heading down to your local Wal-Mart.