Here's what to know about the messaging app used by Trump Administration officials to discuss military strikes on Yemen.

Mike Waltz, the departing national security adviser at the center of "Signalgate," is seen in new photos using the commercial messaging application during a Cabinet meeting held by President Donald ...

Government watchdogs say it’s a slippery slope for the mayor to continue using the controversial encrypted messaging app.

The nation’s top intelligence officials have told lawmakers that it was routine for them to discuss sensitive national security issues on the encrypted messaging app Signal. It’s widely used at their ...

The White House is clapping back against media reports alleging intelligence officials have been using the end-to-end encrypted messaging app Signal to send classified information, describing the ...

Why is Christian Science in our name? Our name is about honesty. The Monitor is owned by The First Church of Christ, Scientist, and we’ve always been transparent about that. The church publishes the ...

TUCSON, Ariz. (KOLD/Gray News) - As the search for 84-year-old Nancy Guthrie enters its third week, the FBI is employing new technology that could help locate her using signals from her pacemaker. Law ...

Former White House national security adviser Mike Waltz was seen using the encrypted messaging app Signal in photos taken during Wednesday's Cabinet meeting. Waltz was removed as national security ...