A catastrophic breach involving top U.S. officials shows that even the most secure apps are useless when human error enters the chat.
Described as the worst U.S. security breach in a generation, the leak is an unprecedented failure for the White House. For several days, a journalist from The Atlantic had unrestricted access to a private Signal group chat involving the highest levels of government—discussing, in real time, an imminent U.S. military strike on Houthi rebels in Yemen. And no one in the administration had a clue.
