Top intelligence officials are set to testify before House lawmakers a day after Senate Democrats grilled them over their ...

Experts weigh concerns over whether Signal can be hacked after it was revealed government officials used the encrypted ...

The administration has downplayed the importance of the text messages inadvertently sent to The Atlantic’s editor in chief.

The Atlantic on Wednesday published screenshots of a Signal chat among President Trump’s national security team that included ...

House testimony followed release of full transcript of the chat over the Signal app — including attack times and weapons.

A Senate hearing spotlighted the defense secretary’s decision to share sensitive information on a messenger app generally not authorized for government communications.

A national security fiasco unfolded when Atlantic editor Jeffrey Goldberg was added to a high-level Signal group chat called "Houthis PC small group." ...