Authorities say the two men who sparked chaos in New Orleans and Las Vegas on New Year’s Day used artificial intelligence in advance.

Investigators discovered a "six-page manifesto" on his cell phone, in which he explained every step of his project in detail.

Army Special Forces member Matthew Livelsberger, 37, died in an apparent suicide in front of the Trump Hotel in Las Vegas ...

A University of Pittsburgh professor called war zone service "really hard on families" and something that "creates the ...