Two of these tragedies drew more sustained national media attention than any American mass shooting since Nathan Desai's late September rampage in Houston.
We asked a constitutional law professor how far a new Democratic President's gun-control policies could go.
After my dad died, I wanted nothing to do with his guns. Years later, they revealed a connection we never had in life.
Share the Safety is a vicious, bleak joke, but it's the only kind of joke you can make about the debate over guns in the US.
This time, it was the Democrats doing the obstructing.
An attorney at the Law Center to Prevent Gun Violence helps us break down the most effective ways of stopping gun violence, from background checks to taking guns away from domestic abusers.
Much has been made of the killer's apparent interest in ISIS, but less time has been spent looking at the ways Mateen fit other patterns of violence.
"When I hear about people who own fifteen assault weapons, I think, Why do you need that?"
America won't be safe until every judge, preacher, pilot, bar patron, and doctor is armed to the teeth.
Despite the pleas of gun control advocates, it doesn't seem likely that the country will do much to prevent another Orlando.
Zimmerman's attempt to commodify and capitalize on the death of Trayvon Martin is a phenomenon that has been happening in American since well before the founding of this country.
Moms Demand Action was launched the day after 20 first-graders and six adults were gunned down at Sandy Hook Elementary School and is now a central grassroots force in lobbying for universal background checks on all gun sales.
With two weeks left before the Iowa caucuses, the story in the Democratic race is Bernie Sanders's surge, and whether Clinton can successfully handle herself in the face of growing pressure.
We've been here before.
This morning, Obama announces plans to tighten background checks on gun sales, armed militants in Oregon have been told to "go away" by locals, a woman who rented out her flat for New Year's Eve came back to an orgy, and more.
As investigators gathered evidence at the Inland Regional Center in the hours after the December 2 attack, longterm residents shared stories of one of the most overlooked strains of gun violence.
For at least a few days after the tragedy that claimed over two-dozen lives in 2012, gun violence took centre stage in America.
Dogged by a relentless conspiracy theorist, one father has spent the past three years fighting to protect the honor of his murdered son.
Firearms have claimed 95 percent of the lives lost to terrorism in the United States over the last 14 years.
San Francisco already has some of the toughest gun control laws in the country, and new legislation is only making it harder to legally own a gun.
Something needs to be done about America's gun violence problem, but these arguments are duds.
We remain reluctant to address gun violence head-on, and often only seem to discuss it when the victims and shooters are both middle-class whites.
A look at what the far-right hive mind has spewed out in the wake of the latest mass shooting.
With a new set of policy proposals, Democratic presidential candidate Hillary Clinton is trying to change the tired national narrative around gun violence.