"Our intelligence reveals that the senior leadership in Iran is aware of this activity," Bergner told a Baghdad news conference. He said it would be "hard to imagine" that Iran's supreme leader Ayatollah Ali Khamenei did not know about the activity.
U.S. Implicates Iran in January Attack, 02Jul07, Lee Keath, Baghdad (AP)

So, will Iran back out or will they gamble with their future. Surely, Iranian leaders are taking into consideration that the U.S. has shown how they can topple leadership and send an entire nation into chaos. Or maybe not. I don't know. Somebody tell me what you think about this situation. I think it seems very serious.