Add Yahoo as a preferred source to see more of our stories on Google. Complicated and very nuanced — that's how researchers describe the challenge of tracking mass shootings and the traits of mass ...

PACIFIC PALISADES, LOS ANGELES (KABC) -- Firefighters have been battling the Palisades Fire for weeks. Their courageous efforts are admirable, to say the least. And for some, it's their military ...

News that a suspected mass shooter with a military background—who remains at large in Maine—has sparked wild theories that he was the subject of government testing or had taken psychotropic drugs.

The Pentagon is looking for a new way to screen social media as part of its background check process, in an effort to prevent extremist behavior in the ranks. The Defense Department "is examining a ...