The 2000-troop milestone in Iraq today was accompanied by
confirmation of Halliburton "civilian contractor" deaths. Specifically, Halliburton's Kellogg, Brown & Root division.
We can confirm that three American civilian contractors were killed in Iraq on September 20. They were working for KBR, a Department of Defense contractor. I would refer you to the Department of Defense for specifics on the attack.
These numbers don't factor into the "coalition forces" casualty list, and over 300 mercenaries have died.