https://en.wikipedia.org/wiki/Keep_Calm_and_Carry_On
(On the other hand, there were a lot of wartime counterintelligence efforts in the U.S. and U.K. which I think must have included public calls for people to turn in suspected Axis spies.)
She got weird vibes from him but at least tried to make conversation with the guy to get a better read on him.
The men who did 9/11 were Arab Muslims. Arab Muslims commit terrorist attacks somewhere in the world every day (though most of their victims are other Muslims). This is actually real, even though it's uncomfortable to acknowledge.
The woman was ignorant and that's on her but also a failure of public education to some extent. See something say something is an extremely valuable tool in preventing terrorist attacks so we should be more careful in considering the motivations of people who see something and say something.
Is it? How many attacks has it prevented?
This. So now I'm curious and I found this posting by Bruce Schneier at https://www.schneier.com/blog/archives/2008/01/how_well_see_... which is relevant. He points to some data that really indicates that it just doesn't actually lead to preventing terrorist attacks at all.
You stop the plane, terrorist is arrested, you're a hero.
You stop the plane, guy turns out to be economist, idiot who thinks Arabs look like Italians and Arabic looks like equations does not even get named.
You don't stop the plane, guy's DSGE model explodes causing the plane to fall out of the sky, and you have lawsuits.
That's not $700,000 per person, it's $700,000 per person per year.
And that's just the TSA, to say nothing of the rest of the War on Terror.