When a Delta Air Lines flight attendant was arrested on June 4 in Indianapolis with a 9mm Glock in her purse, the question soon arose: How did she get the gun to Indianapolis in the first place? Amber Robillard told police she had simply picked up the wrong bag when she showed up for work in Atlanta on June 3. A spokesman for Hartsfield-Jackson International Airport said airline employees there do not pass through the same security checkpoints as the general public, and that carry-on items frequently do not get scanned. Instead, airlines are responsible for vetting their employees and controlling the items they bring on board, he said. "To receive airport identification credentials, employees must pass a security threat assessment, an extensive background investigation and ongoing vetting," he noted in an e-mail.