Online disinformation campaigns thrive in big, polarizing moments for the country — and the impeachment inquiry is no exception.

The case is the latest in a string of recent arrests and investigations related to attempted far-right infiltration of the U.S. military, prompting calls for more thorough screenings of enlistees.

Day after day, researchers are immersed in the propaganda of ISIS and neo-Nazi factions. But there's almost no discussion of the mental toll of examining the world's most dangerous extremists.

Kholoud Sawaf wanted to challenge American perceptions of Syria with a play inspired by Romeo and Juliet. Instead, she endured a three-year ordeal involving war, displacement and the U.S. travel ban.

Two years ago, a rally in Charlottesville exposed the violence of the nation's white nationalist movement. Now, victims of that violence want the courts to hold the organizers accountable.

Ten individuals impacted by the violence of the 2017 white nationalist rally in Charlottesville, Va., have filed a federal civil suit against two dozen organizers of the rally.

In 2017, Mike Signer faced a small-town leader's nightmare: a racist rally that spiraled out of control and ended in bloodshed. Two years later, Signer is on a mission of education — and atonement.

Domestic extremism researchers say the manifesto linked to the El Paso shooter is intended as a call to arms to other white nationalists. Such explicit calls for violence are becoming more common.

The manifestos left by far-right attackers often allude to historical texts in an attempt to lend legitimacy to violent actions.

President Trump spoke to the nation from the White House on Monday and called this weekend's mass shootings barbaric slaughters. He named specific causes for the extremist violence.

Minutes before the El Paso shooting, a manifesto was posted online, calling the attack as a response to an "invasion" of Hispanics into the U.S. What can authorities do to fight far-right violence?

Police are trying to learn whether a four-page manifesto that has surfaced online was written by the suspect in yesterday's El Paso, Texas shooting.

Investigators are looking at links between a four-page screed and the alleged El Paso shooter.

A role-play war game for teenage girls is part of a larger effort to boost women's participation in national security.

A unique gaming exercise allows girls to be generals for a day as part of an effort to boost women's participation in national security.

The president is hosting social media bloggers whom the White House claims face discrimination online because of their conservative views. But some of the invitees are far-right conspiracy theorists.

For years, women have fought for inclusion in the high-stakes world of national security. Now, they say, the effort to build a pipeline of qualified women leaders is paying off.

For years, women have fought for inclusion in the national security sector. Now, there's a movement to organize those efforts and to show the risks involved when women are left out.

We look at the participation of far-right extremists at President Trump's 2020 kickoff rally and what this means for his campaign.

Federal authorities say far-right violence is the deadliest and most active form of domestic extremism. Now, a debate is heating up about how to define a threat the White House barely acknowledges.