Bloomberg:

Nine U.S. soldiers were killed and 20 others injured in one of the deadliest attacks on coalition forces in Iraq this year when a suicide car bomb exploded at a base northeast of Baghdad.

The attack took place yesterday in Diyala province, a region that has seen increased fighting between U.S.-led coalition troops and insurgents in recent months.

An Iraqi civilian was also wounded in the attack on Task Force Lightning soldiers, according to an e-mailed statement from Multi National Corps - Iraq. Seven Iraqi policemen were killed and 12 others were wounded in a separate bombing yesterday on a checkpoint near Diyala's provincial council headquarters, the military said.

As Swopa points out, that's what happens when they have you surrounded.