The internet-savvy generation leading the protests in Iran has made it hard to deny the ruling regime's lack of popularity or legitimacy. Still, Washington's appreciation of the movement is bafflingly poor.
Social media and Twitter are to democracy like emergency rooms are to life and death. When Iran puts a drill bit through its "democracy" by pulling a fast one, activists at the grass roots level have the buzzer to call an alarm before the patient bleeds to death.
What has changed in Tehran over the past four years to create a situation where a relatively moderate reformer candidate, Mir Hossein Mousavi, can challenge an incumbent hardliner, Mahmoud Ahmadinejad?