I'm not sure PJ. I found it just after 9/11 when I was going thru an extensive research phase into Islam. I suspect that it was taken in the UK (the writing on the signs in background is in english) but it might have been in the US.
Because I felt that we (American/Western culture) are blind to the intentions of the islamists, I placed it on the main page of my vanity site with the following caption from Apocolypse Now:
" Every minute I stay in this room I get weaker. And every minute Charlie squats in the bush he gets stronger. " -- Captain Willard, Apocalypse Now