China arrests four Rio Tinto workers in trade-secrets dispute.
Congressional oversight group urges Treasury to buy up toxic assets of community banks.
Iron ore producers could get shafted after Beijing's Rio Tinto rant. | Goff: Latest move no Shanghai surprise
AIG returns to profitability, thanks in large part to bookkeeping boosts.
But dividend payments to Uncle Sam eat up most of the insurer's earnings. | Goff: Right now, AIG a paper lion