Authorities allegdly found an AR-15 with 27 rounds of ammunition in Billy Joe Cagle's vehicle, Atlanta Police Department Chief Darin Schierbaum said

Billy Joe Cagle is accused of bringing 27 rounds of ammunition and a Springfield AR-15 rifle in his truck Monday to Hartsfield-Jackson Atlanta International Airport.

Atlanta police arrested Billy Joe Cagle, of Cartersville, Georgia, before he was able to go through with it, likely saving several lives in the process.

The man, who authorities said had "mental challenges," had 27 rounds of ammunition and an AR-15 rifle in his truck.

Authorities in Atlanta said Billy Jo Cagle, 49, was surveilling a TSA checkpoint in the domestic south terminal before he was taken into custody.

Moments after receiving a report of a man who threatened to shoot up the world’s busiest airport while livestreaming, Atlanta Police Officer Myesha Banks spotted a man matching his description in the crowd.