Perhaps, if we only knew how many hijackings the locked door prevented. It’s not something you can do a survey about. How do you find out how many potential hijackers decided to do something else because the cabin doors were locked? Has ANY terrorist been caught, and said that he was thinking of hijacking a plane, but the locked doors dissuaded him?
They implemented many new safety protocols after 9/11, and increased intelligence (well, until THIS administration), and it is likely a combination of all of them, rather any single one.
Perhaps, if we only knew how many hijackings the locked door prevented. It’s not something you can do a survey about. How do you find out how many potential hijackers decided to do something else because the cabin doors were locked? Has ANY terrorist been caught, and said that he was thinking of hijacking a plane, but the locked doors dissuaded him?
They implemented many new safety protocols after 9/11, and increased intelligence (well, until THIS administration), and it is likely a combination of all of them, rather any single one.