Updated on: March 25, 2025 / 4:41 PM EDT / CBS News Latest on Yemen bombing group chat Latest details on Trump officials' group chat with journalist about Yemen bombing 18:37 The National Security Agency sent out an operational security special bulletin to its employees in February 2025 warning them of vulnerabilities in using the encrypted messaging application Signal, according to internal NSA documents obtained by CBS News. News of the NSA bulletin comes amid the continued fallout from an ex...