Is Russia a Partner of Convenience in the Middle East?

Diane Ravitch: A big fear is that Russia delivers a weapon to Iran that allows them to deliver the capability of delivering a nuclear warhead. She says there's a sense that Russia doesn't want to go that far, which may be why Israel isn't more deeply involved in Ukraine. Ravitch: There's a lot of calculus going on here about how much to antagonize Russia and waiting to see what Russia is going to provide to Iran.