Yemen is in a state of civil war, and Iran and Saudi Arabia are taking sides.
Over the past three weeks, a Saudi-led coalition of Arab States has launched air strikes against Houthi rebels, who they say are Iran's Shiite puppets on their southern border.
Iran, has condemned the move, and says Saudi Arabia is oppressing the Houthis. So what is the relationship between Iran and the Houthis?
Roland Elliott Brown talks to some regional specialists.