This document summarizes a presentation given by Dr. Phil and Captain Polly about the feasibility of cyber-hijacking airplanes. They discuss the aviation systems commonly claimed to be vulnerable like ADS-B, ACARS, and transponders. While these systems have no security, attacking them would likely only create phantom traffic or bogus messages. Hijacking a commercial airliner through its systems is not practical as they have mechanical backups and any electronic issues would trigger alerts to pilots. The closing thoughts note that increased automation and unsecured protocols do pose problems, but currently airliners themselves are relatively secure.