Pilots have a panic button. It's called squawking code 7500. Alerts ATC that there is a hijacking situation (7700 is general emergency.) Guns in airplanes are a

Pilots have a panic button. It's called squawking code 7500. Alerts ATC that there is a hijacking situation (7700 is general emergency.) Guns in airplanes are a bad idea for, well, quite a few reasons.