US troops leave Iraq at the end of 2011, and by the following year Washington's spending there has dropped to five percent of its 2008 peak. Correspondent Sebastian Walker, who first reported from Baghdad in 2003 and covered the war for years without embedding, returns for this two-part Fault Lines report to see what has replaced the occupation. In the first episode he travels from Basra to Baghdad, talking to Iraqis rebuilding lives amid unexploded ordnance, sectarian mistrust, and a government still finding its footing. The second episode takes him from Erbil to Fallujah, tracing how Kurdish autonomy in the north and the scars of the Sunni insurgency in the west pull the country in different directions. Walker asks people on the street and in government offices whether the new balance of power can hold or whether Iraq is heading toward fragmentation along the fault lines the war exposed. The film offers no tidy verdict, just the accumulated evidence of a country testing its own cohesion.