Don't believe all that you see on Youtube (unless it is believed and approved by Hillary and Obama)

"I was in Tehran earlier this year and failed to see any demonstrations in the centre of the city, though there were plenty of riot police standing about. I was therefore amazed to find a dramatic video on YouTube dated, so far as I recall, 27 February, showing a violent demonstration. Then I noticed the protesters in the video were wearing only shirts though it was wet and freezing in Tehran and the men I could see in the streets were in jackets. Presumably somebody had redated a video shot in the summer of 2009 when there were prolonged riots." (thanks Nu`man)