Russia's refusal to deliver S-300 surface-to-air missile systems to Iran means Tehran could turn to China as its main arms supplier, depriving Moscow of a serious source of revenue, a Russian daily suggested on Wednesday. Moscow said in mid-June it would freeze the delivery of S-300 air-defense systems following a new round of UN sanctions imposed on Tehran on June 9. Security Council Resolution 1929 imposed a fourth set of sanctions on Iran over its nuclear program, including tougher financial controls and an expanded arms embargo. The S-300 contract is worth some $800 million, while Russian experts estimate the penalty for breach of contract at $400 million. Furthermore, Iran could refuse to buy any more military products from Russia, leading to an estimated loss of $300 million to $500 million a year. http://en.rian.ru/russia/20100630/159641465.html So is Russia going to sell S-300 systems to Iran!!!