Odette Yousef

One individual may be responsible for hundreds of false reports of active shooters across the U.S. The hoaxes have raised awareness of "swatting," and how it may be a national security threat.

Two decades after Congress authorized the creation of the Department of Homeland Security, there's growing concern about whether DHS is doing enough to combat domestic violent extremism.

Researchers say the days following the election may pose a greater risk of violence than Election Day itself, particularly in locations where vote counting drags on.

An attack on the Speaker of the House's husband. Conspiracy-influenced poll watchers wearing tactical gear and staking out ballot drop boxes. Many experts are worried about the potential for violence.

Law enforcement officials are warning of potential attacks against election officials, political candidates, religious minorities and others.

A new U.S. government report shows that domestic terrorism investigations and arrests reached new heights in 2021, but it shows a complicated landscape when it comes to threats against the country.

As schools across the U.S. are targeted by false calls about active shooters, NPR has found evidence that a similar scheme took place in the spring.

There's been a surge in hoax calls about active shooters at schools across the country during the last three weeks. Many of them fit a strange, new pattern.

In September, schools across the country started getting hoax calls that active shooters were on their campuses. But nearly one month in, there are more questions than ever.

Trials began this week in Idaho for 31 members of a far-right group accused of conspiring to riot at an LGBTQ event. But calls are growing for federal involvement to bring greater accountability.

Jury trials are beginning for some members of a white nationalist group accused of conspiring to riot at a June LGBTQ event. But some experts say these local prosecutions yield little accountability.

The White House is spotlighting the rise in hate-fueled violence at Thursday's United We Stand summit. It aims to kickstart efforts to help communities prevent, respond to and recover from attacks.

Many say rising political division and ideological violence threaten democracy but there are risks with Biden addressing it directly. President Biden and Vice President Harris will give remarks.

A recent campaign succeeded in diminishing the reach of a website that is notorious for harassing autistic and transgender people, and which has been linked to at least three suicides.

President Biden's speech honed in on "MAGA Republicans" as an extremist force in politics. But his remarks also left out much of the context that has led to popular support for political violence.

Experts say the U.S. approach to countering violent extremism has worked well against foreign terrorists. They question whether it will work as well to identify credible domestic threats.

A recent attempted attack on an FBI office has raised concern about violent far-right rhetoric, but assessing the exact nature of the threat presents new challenges.

Steve Bannon's conviction for defying a subpoena from the Jan. 6 House panel could result in fines or jail time. That's raised a question of whether the ex-Trump adviser would podcast from prison.

The Highland Park shooting suspect doesn't seem to be associated with a ideological or political bent. But extremism researchers say these kinds of acts may actually be part of a troubling new trend.

The Highland Park shooting suspect doesn't seem to be associated with a ideological or political bent. Extremism researchers say these kinds of acts may actually be part of a troubling new trend.