It depends on the situation. If I am walking around with a small camera or my iPhone, I do not necessarily ask. I value the lightness of that process. Sometimes I will exchange a glance of acknowledgement if I sense a person would prefer that. In my more recent work exploring/documenting Saudi Arabia, I have chosen to actively ask my subjects to be photographed. I do not want them to be stolen moments. I want them to be given, to be honest, for a person to be seen as they wish to be seen. I started carrying around a laminated note in Arabic stating what my project was about and if I could take a photograph. I have no interest in telling people how to see Saudi Arabia. I believe Saudi Arabia has to be seen on its own terms. I hope that through this process, it will speak for itself, in all its variations. I find it is a country of private people, and I will always choose to respect that over anything else.