CIA Director John Ratcliffe testified that using Signal for work is allowed by the CIA. The Atlantic's editor-in-chief was added to a Signal chat where Trump officials discussed war plans. Trump ...

The Trump administration is facing criticism over its use of Signal to discuss sensitive military plans.

Mike Waltz, the national security adviser for President Donald Trump, is seen in photos using Signal during a Cabinet meeting on April 30.

The chat app got an unusual kind of endorsement after U.S. national-security officials were revealed to be using it to share information about a pending U.S. military strike.

Yes, Biden admin authorized use of Signal — but not for sensitive military intel The claims spread after members of President Donald Trump's White House accidentally added The Atlantic's editor ...