A new algorithm could speed up detection of weapons-grade nuclear material at national borders to protect against nuclear terrorism, researchers report.

"It's not just 'Did this happen to you?' But 'Did something almost happen to you?'"

New research uses brain scans to investigate how "sacred values" can motivate extremist violence.

"We haven't previously seen this overlap between street gangs and politicized violence."

Live streaming is a tool terrorists use to spread messages of fear, whether they're radical right-wing extremists or members of ISIS, an expert says.

"The bottom line is that these attacks are happening and they're overlooked."

Researchers have discovered a drug that can save nonhuman primates from ricin and humans could be next.