A man in Northern England said he had stumbled upon hundreds of documents, including threat assessments, armory codes and ...

Across Washington, the Signal leak presented a major test early in Trump's second term on the federal government's system of ...

The defense secretary’s handling of sensitive information is under criticism after he shared details about a strike on Houthi ...

Under questioning from senators, the C.I.A. chief and the director of national intelligence pointed to the defense secretary ...

Days after the editor-in-chief of The Atlantic revealed that he had been accidentally included in a group chat with many of ...

Here's what we know about whether officials shared classified intel in leaked group chat that included the editor-in-chief of The Atlantic.

Colo., told Morning Edition that "the risk of casualties goes up tremendously" if adversaries learn of military operations.

Lawmakers are demanding answers after Trump-era officials used the Signal app to discuss military strikes. A federal judge ...

The Trump administration’s use of Signal for military discussions, including a journalist, raises national security concerns.

The House hearing comes a day after Senate Democrats grilled intelligence chiefs over group chats that revealed U.S. military ...

Republican and Democratic leaders on the Senate Armed Services Committee are requesting a formal investigation into the ...