Overview

• William Liebisch, 43, from Cincinnati, was sentenced to 30 months in prison after threatening to stab a fellow passenger on a Frontier Airlines flight.
• The flight, en route from Cincinnati to Tampa, was forced to make an emergency landing in Atlanta following Liebisch's threats.
• Liebisch managed to board the plane with a box cutter, despite TSA officials removing the blade, by concealing a spare blade in the handle.
• Passengers and flight attendants played a crucial role in subduing Liebisch and preventing further escalation of the situation.
• The incident has prompted the TSA to conduct additional trainings to prevent similar security lapses in the future.