Trump officials used Signal app to discuss military plans, mistakenly including a journalist.

Signal, a secure messaging app, was mistakenly used by Trump administration officials to share plans for military action in Yemen, inadvertently including The Atlantic's editor-in-chief, Jeffrey Goldberg, in the chat. This incident has sparked calls for a congressional investigation and raised concerns about the security of sensitive information. The Pentagon has since warned against using Signal for unclassified information due to potential vulnerabilities, though Signal denies any unaddressed security issues.