Watch: U.S. intelligence leaders testify in House after Signal flap
The use of civilian software to discuss sensitive military and government matters came to light after a journalist from The Atlantic magazine said he was mistakenly added to a group chat on Signal.

The use of civilian software to discuss sensitive military and government matters came to light after a journalist from The Atlantic magazine said he was mistakenly added to a group chat on Signal.
(Image credit: Andrew Harnik)