On Putin's "trip" to Tehran, Oddly enough, from Israel's Haaretz, read here
"...Russia under Putin does not change its views so quickly. Certainly not because of Israel. Russia has a clear and consistent foreign policy. It was consolidated over the past four years in light of the sharp rise in energy prices, which turned Russia into a rich country, and thanks to Putin's leadership, which seeks to challenge the United States and restore Russia's former glory..."
"...Russia does not want its Shi'ite Muslim neighbor to have nuclear weapons, but it also sees Iran as an important market for the sale of arms and nuclear power plants for producing electricity. As far as Russia is concerned, Iran has been a target of diplomatic influence throughout history..."