U.S. airstrikes in Iraq could intensify

U.S. warplanes have carried out hundreds of airstrikes in Iraq in the past two years, bombing and strafing insurgent fighters and targets almost daily. And the air war, which has gone largely unnoticed at home, could intensify once American ground forces start to withdraw.

Since Iraq doesn't have a working air force, U.S. jets are expected to provide air cover for Iraqi troops for at least several more years.

Some analysts have raised questions about how effective air power can be in a counterinsurgency war. A key fear is that Iraq's mostly Shiite Muslim and Kurdish army will use American and allied bombing missions for revenge attacks on the Sunni Muslim Arab minority, which provides most of the insurgency's fighters.

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