Supporters of Muqtada al-Sadr, the powerful Iraqi Shia leader, stormed the Parliament building in Baghdad this past week. Sadr’s political party won more seats than any other group in the last election, but those lawmakers walked out and Iraq hasn’t had a government for nine months. So, what does Sadr want? Why do so many Iraqis support his political movement? And who is Muqtada al-Sadr? From Baghdad, Yasmine Mosimann reports.