@msnbc: Retired U.S. Army General Barry McCaffrey reacts to The Atlantic editor-in-chief Jeffrey Goldberg's story about being accidentally added to a Signal group chat with members of President Trump’s administration as they discussed plans to launch airstrikes against Houthi militants in Yemen. Goldberg was unsure the chat was authentic and exited the conversation after personally concluding it was real. “At this time, the message thread that was reported appears to be authentic, and we are reviewing how an inadvertent number was added to the chain,” the National Security Council said in a statement to NBC News and the White House said it is reviewing the incident.