No unequivocal evidence has been yet revealed to prove election fraud in Iran. It is entirely possible that Ahmedinejad won and therefore the regime is correctly viewing the ongoing protests as a means to overthrow an election by extra-legal means.
I'm not a fan of the Ayatollahs, and if their power is overthrown, I'd be quite happy. However, it is quite another thing to use lies to lead Iranians to risk their lives to overthrow the regime, just to suit our interests. And there is some reason to be skeptical. For example, is the Twittered news real?
http://openanthropology.wordpress.com/2009/06/17/americas-iranian-twitter-revolution/.
One year with the Epson ET-8550 printer
22 hours ago