President-elect Donald Trump has promised to "protect self-defense everywhere it is under siege."

Jorge Leon’s patent for the "Glock switch" expired in 2016, but the device is still widely available in the U.S.

Three females and two males, including an 8-year-old boy, died in a horrific series of "execution style" shootings on Friday night in Cleveland, Texas.

ABC News’ Martha Raddatz interviews Jason Armstrong and Allison Anderman about the recent spikes in gun violence on “This Week.”

ABC News contributors Wizdom Powell and Dr. Janet Taylor join ABC News Live Diane Macedo to discuss recent gun violence and how it can weigh on people’s mental health.

Local officials in Ohio are commending the quick thinking of an alert high school student who they say potentially averted a school shooting.

A North Carolina preschool teacher shares her reaction following a school shooting in Nashville and discusses what she carries in school in the case of an emergency.

The new protocols were announced weeks after a 6-year-old shot and injured his teacher.

ABC News chief justice correspondent Pierre Thomas unpacks a new report by the U.S. Secret Service on U.S. mass attacks from 2016-2020, and the trends it reveals about attackers.

Even the state with some of the strictest gun laws can't keep gun violence away from its borders.

ABC News’ chief justice correspondent Pierre Thomas spoke with Chicago Police Superintendent David Brown on efforts to drive down gun violence.

Glock is the top manufacturer of recovered guns seized in nine of the 12 cities.

“Imagine if this was your kid or your grandkid?...Could you ever forgive yourself for not supporting a simple law that would make these mass shootings less likely?” Sen. Chuck Schumer said.

ABC News’ Linsey Davis speaks with Philadelphia Police Commissioner Danielle Outlaw on the surge of gun violence in the U.S. and how communities are working to respond to the influx of guns.

A look at the number of mass shootings involving legally purchased guns.

Obama made sure that the life of a young girl whose life was cut short by gun violence in Chicago was remembered at the Obama Presidential Center.

How the Supreme Court transformed gun rights overnight, and how they could do it again.

A look at the level of gun violence in the U.S. through statistics.

After her daughter, Jaya, 18, was shot at a convenience store, Chicago nurse Nyisha Beemon is turning her pain into her purpose and rallying for change with other "Warrior Moms."

Using research and statistics, experts examine America's history with guns, the real-life impacts of gun violence and what can be done going forward to mitigate the problem.