American forces have dramatically increased airstrikes in Iraq during the past five months, a change of tactics that may foreshadow how the United States plans to battle a still-strong insurgency while reducing the number of U.S. ground troops serving here.

And, as a side note that's really quite central, this is precisely why the "Murtha plan" is not a plan for withdrawal at all. It's a plan to reduce American casualties, and, not coincidentally, increase the number of "accidental" civilian casualties.