Country’s busiest airport steps up security

Before the new measures, employees only had to swipe their badges to gain access to secure areas of the airport. Now private security guards are checking their bags and personal belongings before they are allowed to enter a security door at the main terminal.

“There’s a phased-in approach to get to full employee screening,” airport spokesman Reese McCranie said.

A day in the life of the Atlanta airport

“It can’t be a one size fits all,” Southwell said. “In addition to the background checks as an employee, there’s an enormous amount of training that goes on. There’s an enormous amount of retraining that goes on as well.”

Watch Anderson Cooper 360° weeknights 8pm ET. For the latest from AC360° click here.

CNN