Dubai,
The only place in the world I have personally observed an airport security guard beat a downtrodden man in an airport queue with a baton - obviously a poor peasant labourer going home.
I was lucky enough to be in uniform and went straight for the officer in charge and with a bit of yelling tried to cause a bit of local shame as there was some international event happening in the place at the time.
There was no shame or compassion.
Very grateful for my circumstances and not this poor chaps.