As the nation struggles to pinpoint what might help prevent violence in the wake of the mass murder at Sandy Hook Elementary School, a program being piloted at a school in rural Ohio may have one solution. The theory: short bursts of therapeutic exercise — even if practiced in a standard health class — can drastically improve an adolescent’s chances of dealing with stress in environments as diverse as inner-city Los Angeles and rural Kentucky.

VIDEO: Student Voices Chime in on Preventing School Shootings

BLOG: President’s Campaign Arm Making Gun Control Push

In the wake of the mass shooting at Sandy Hook elementary school in Newtown, Conn., the Journal News in Westchester County, New York, made freedom of information requests for pistol permit holders in its home county and neighboring Rockland County. The paper published the permit information, including the names and addresses of the permit holders, in an interactive map Dec. 22.

The data covered all permit types – residential, business, target and hunting among them – but for pistols only. Because New York does not require permits for rifles and shotguns, those weapons were not included.

The interactive functionality allowed users to view specific names and addresses of permit holders, pinpointed on a scalable map.

The lasting impact the shooting massacre in Newtown, Connecticut, has had on the political debate over guns has also brought heightened attention to the specific language employed by both sides. PBS NewsHour examines the different rhetorical strategies and their evolution.

FRONTLINE: Who Was Adam Lanza? Live Chat Replay

Jeffrey Brown explores whether there is any connection between violent video games and violent behavior.

BLOG: The Gun: a Trigger for Art

BLOG: Public Opinion May Support Expanded Gun Sale Background Checks

In the wake of the mass killings at Sandy Hook, FRONTLINE looks for answers to the elusive question: who was Adam Lanza?

VIDEO: “There was a Weirdness” About Young Adam Lanza

BLOG: Were Sandy Hook Killings Inspired by Norwegian Massacre?

SLIDESHOW: Adam Lanza’s Path to the Sandy Hook Tragedy

How the gun control debate is playing out on social media.

BLOG: How The #Newtown Tragedy Unfolded on Twitter via Andy Carvin

BLOG: With Small Kids: Consider a Media Blackout During a Crisis Like Sandy Hook

While there is some evidence linking violence to risk factors such as age, sex, substance abuse, and personality traits such as anger and impulsiveness, over many years, researchers have established that only a very small subset of people suffering from mental illness are likely to commit violent acts. NOVA investigates what we know and what we don’t about the neuroscience of violence.

VIDEO: Criminal Minds: Born or Made?

BLOG: Neuroprediction and Crime

More than a decade ago, FRONTLINE set out to understand how a troubled young man with no history of violence could become a random killer in the halls of his high school. What clues in his background, experience or medical condition might help make sense of a senseless crime?

On May 20, 1998, 15-year-old Kip Kinkel shot and killed his mother and father. The next morning he went to school and opened fire on his classmates, killing two and wounding 25.

This is the story of Kip Kinkel at Thurston High.

Over the last few years, dozens of states have significantly rolled back gun restrictions. Need to Know’s John Larson traveled to Virginia to see what’s known as the “open carry” movement first-hand and to investigate how the gun rights movement has become so effective in easing gun control laws. And, John Larson talks with Larry Pratt, the head of Gun Owners of America about Newtown.

PREVIEW: After Simon’s Rock, a Need to Know special report looking at a small college shooting in western Massachusetts some 20 years before Newtown. Even today, the families of victims and survivors are still trying to come to terms with what happened. (Airing Friday, Feb. 22, on PBS)

PROPUBLICA: Five federal policies on guns you’ve never heard of

VIDEO: Obama and Biden speak on new gun laws

SLIDESHOW: The world reacts to Newtown

In a wide-ranging and personal interview Secretary of Education Arne Duncan talks to Gwen Ifill about growing up in Chicago, saying, “Gun violence has haunted me my entire life.” In his first interview since the tragedy, he describes how crimes against school children during his tenure as superintendent of the Chicago public school system shaped his own views on guns. And, while warning “it will never be the entire solution,” Duncan looked at the role government can start to play in trying to solve these problems.

GOOGLE HANGOUT: Arm Teachers or Ban Video Games? Students Debate