The Department of Defense has identified 3,621 American service members who have died since the start of the Iraq war. It confirmed the deaths of the following Americans yesterday: COFFELT, Ronald L., 36, Sgt., Army; Fair Oaks, Calif.; 18th Airborne Corps. CRAIG, Brandon M., 25, Pfc., Army; Earleville, Md.; Second Infantry Division. HARRELSON, James J., 19, Pfc., Army; Dadeville, Ala.; First Infantry Division.