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Atlantic editor-in-chief mistakenly placed on Trump officials’ war plans group chat

The editor-in-chief of The Atlantic magazine, Jeffrey Goldberg, says he was mistakenly added to a group chat with Trump administration officials on the commercial encrypted messaging app Signal. The Vice President, Secretary of State and Secretary of Defense were among those in the chat discussing plans to attack Houthi rebels in Yemen. Goldberg tells NBC News’ Andrea Mitchell he thought the chat was a hoax at first because he could not believe the officials would have “such poor operational security.”