Troops advance into Sadr city

US and Iraqi troops are today pouring into Baghdad’s main Shiite militia stronghold, testing the Shiites’ commitment to the US-promoted campaign to drive militants from the capital.

Outside Baghdad, US soldiers described a raid last week that uncovered a suspected Sunni “torture site” and the rescue of two Iraqi captives, who apparently had been spared immediate execution because the militants’ video camera broke and they wanted to film the killing.