Konstantin Sivkov(Russian commander)stated Iran would be a "hard nut" to crack for Israel. Israel has limited capacity for an air strike because of the lack of enough refuel tankers and Iranian TOR- M Russian systems. IF Iran acquires S-300, NO chan ces for Israel to attack Iran!!! Ground invasion against Iran? The end of Israel!!!
EU's Mogherini in Tehran to talk nuclear deal, regional issues (Reuters)
from the article: Israel can't launch strike against Iran on its own