ATLANTA (AP) — Police arrested a man at Atlanta's bustling airport on Monday after getting a tip from his family that he was planning to shoot up the place, and found an assault rifle and ammunition in his truck outside, the city's police chief said.

Billy Joe Cagle, of Cartersville, Georgia, had described his plan to shoot up the world's on a social media livestream, Chief Darin Schierbaum said during a news conference.

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