The head of the Joint Chiefs of Armed Forces of the United States commented lifting the ban on Russian deliveries of S-300 to Iran. According to Martin Dempsey, anti-aircraft missile complexes do not prevent America strike on Iranian nuclear facilities if necessary.
Recall that in early April, thanks to the newspaper The Wall Street Journal, it was reported that the US military at a secret test site in January tested the largest bunker bombs. As noted, such bomb is allegedly able to hurt anyone, even the most fortified nuclear facilities.
Victor Murakhovski, chief editor of "Arsenal of the Fatherland", " Till now no one experienced of overcoming air defense systems, manned S-300. As the experience of those who are faced with systems of this generation, for example, with the same system "Buk" (it's medium-range complex), the consequences can be very sad. Therefore, given that Iran already purchased from us near field complexes "Tor", which covered just nuclear facilities (in particular nuclear power plant, which Russia built), and given that they will receive the S-300, it will be united air defense system, which is extremely difficult to suppress or to break. I do not think the United States and General Dempsey dare to do such an operation, but if they do, then success of it will be under the question."