The news of Trump officials using Signal for a group chat on military operations has raised many questions about just how secure such messaging apps are and the risks if government officials use them ...

Rubio to Discuss Energy Security, Illegal Migration in Caribbean ... overseas was also going to be among the topics that Rubio will tackle with his counterparts. Washington has threatened to ...

"It was commonplace to stand up chats on any given national security topic," according to one person involved in the chats, adding that the groups frequently included Cabinet members and senior staff.