Georgia authorities say they prevented a possible mass shooting in one of the world’s busiest airports on Monday morning after a man’s family warned cops that their rifle-wielding relative was headed there to “shoot it up.”

Billy Joe Cagle’s family members alerted the Cartersville Police Department that their relative livestreamed on social media that he was going to target Hartsfield-Jackson Atlanta International Airport, Atlanta Police Department chief Darin Schierbaum said at a Monday press conference. 3

The family told police that Cagle, 49, was in possession of an assault rifle, Schierbaum said.

Unbeknownst to officers at the time, Cagle had already arrived at the airport around 9:29 a.m. and entered the south domestic terminal, video footage showed.

“He seemed to be very i

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