The Department of Homeland Security's new 'masked engagement' policy allows federal agents to create fake social media profiles to monitor private groups, raising privacy concerns.

Investigators have still not identified a leading motive for Nancy Guthrie’s February 1 disappearance from her Arizona home, with authorities looking at all possible options, a source told CNN. Her ...

A fake Android antivirus app called TrustBastion is spreading malware and stealing banking credentials. Here’s how it works and how to stay protected.

President Thomas Jefferson was big on recording the weather wherever he was. His notes on temperature, nature and rainfall are becoming a record on climate history.