U.S. national-security leaders included me in a group chat about upcoming military strikes in Yemen. I didn’t think it could ...

Jeffrey Goldberg, the editor-in-chief of The Atlantic who was added to a group chat, wrote that he had "never seen a breach ...

The Atlantic's editor-in chief said he was texted war plans for upcoming military strikes in Yemen in a secure Signal group chat that included the U.S. defense secretary.

When adding somebody to the group chat about classified information that itself violates government rules, double-check that Jeffrey Goldberg isn't on the thread.

President Donald Trump’s claim that he was unaware of a cabinet-level breach of classified information—an incident reportedly ...