It's happened before https://en.wikipedia.org/wiki/2018_Horizon_Air_Q400_incident https://en.wikipedia.org/wiki/2018_Horizon_Air_Q400_incident https://www.cnn

It's happened before https://en.wikipedia.org/wiki/2018_Horizon_Air_Q400_incident https://en.wikipedia.org/wiki/2018_Horizon_Air_Q400_incident https://www.cnn.com/2018/08/12/opinions/seattle-stolen-plane-opinion-abend/index.html https://www.cnn.com/2018/08/12/opinions/seattle-stolen-plane... > most airlines do not lock airplanes because access can only be obtained by security vetted employees through jet bridges and coded door ramp access.