Dangerous hobby ;-)

What are you doing? the policeman asks from behind of my back.
Mechanically I clutch my small digicam in my hand.
Have I overseen something? A police station? A military guard?
Do I look like a terrorist preparing a bomb attack?
The policeman goes on talking to me in Algerian. Threatened as I feel I understand even less than usually.
I call my husband who is walking ahead, as he knows that his wife is constantly stopping to take pictures. He exchanges a few words with the policeman who is greeting us with a nice smile.
He wanted to know why you are taking pictures from these tiles. I told him, you like them. And why these of all tiles in Algiers?
I smile back, relieved.
Tourists are not an everyday phenomenon in Algiers.