US and Iraqi forces have been battling Moqtada al-Sadr's Mahdi Army there since March 25.
Iraq's oil minister says the assault helped curb oil smuggling.
While the Sunni heartland has largely turned against Al Qaeda in Iraq, insurgents are still doing battle in the 'wild' reaches of the province.
A week after a truce calmed clashes between Moqtada al-Sadr's militia and Iraqi forces, fighting resumed in his Baghdad stronghold Sunday.
A sprinter and an archer – two of the four Iraqis who have qualified so far – struggle to train amid sectarian divides and a dearth of equipment.