Newly released surveillance footage has captured the tense moment a suspect breached a TSA checkpoint at an Atlanta airport last year, only to be swiftly tackled by a bystander and subdued within seconds. In the footage, Leon appears to rush through the airport before attempting to enter the TSA checkpoint. A TSA officer then reacted and reportedly yelled “breach,” prompting bystander Mark Thomas to turn around without hesitation. 6 Mark Thomas grabs alleged TSA breacher Fabian Leon at a security checkpoint at Hartsfield-Jackson Atlanta International Airport. He just kept saying, ‘Oh, I’m okay, I’m okay, let me up, let me up, I’m okay’,” Thomas said.