The Islamic Revolution of 1979 made Iran the enemy of two great powers: Washington, and Moscow.
36 years later, Iran has signed a deal with both the US and Russia, along with four other major powers, over its nuclear program.
Now, there is plenty of talk about better relations between Iran and the West.
But what did Russia get from the Iran deal?
Roland Elliott Brown speaks to two experts -- one American, one Russian -- to find out.