This was an interesting article I found which addresses the "enemy" aspect of Iran vis a vis the U.S.
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WAS IRAN BEHIND Nine Eleven? If so, how much and how?
"Three rare testimonies by three Iranian intelligence establishment defectors have been marked as witnesses X, Y and Z. Their videotaped testimonies offer a profound peek into the depths of the kingdom of evil. For long hours they recount their childhood and adolescence in Tehran and how they were hired for the prestigious posts in Iran’s spy agencies. Then, they start talking about the ties between Iran, Hezbollah and al-Qaeda.
Witness X testifies about Iran’s advance knowledge of the plan to crash passenger airliners into strategic targets in Washington and New York. He testifies that he was present at training facilities for Sunni terrorists in Iran and adds many details about the way Iran’s intelligence service utilizes legitimate Iranian organizations such as its airline and shipping company for terror aims.
Witness Y testifies about Imad Mugniyah’s personal involvement in training the September 11 hijackers and the shelter granted by Iran to al-Qaeda’s men after the attacks. Meanwhile, witness Z says that he was present in a series of meetings in Tehran involving senior al-Qaeda men, local intelligence officials and Mugniyah’s men in the months before the 9/11 attacks."
(Source: https://www.ynetnews.com/articles/0,7340,L-4120430,00.html
This source is a national daily newspaper published in Tel Aviv, Israel. Founded in 1939 in Mandatory Palestine, Yedioth Ahronoth has been the largest newspaper in Israel by sales and circulation