Following is the official list of American servicemen killed in Operation Iraqi Freedom as of 6:30 p.m. Thursday:

Navy Lt. Thomas Mullen Adams, 27, of La Mesa, Calif. Killed when two Royal Navy Sea King helicopters collided over international waters March 22. Assigned as an exchange officer with the Royal Navy's 849 Squadron since October 2002.

Spc. Jamaal R. Addison, 22, of Roswell, Ga. Killed when ambushed by enemy forces in Iraq March 23. Assigned to the 507th Ordnance Maintenance Company, Fort Bliss, Texas.

Maj. Jay Thomas Aubin, 36, of Waterville, Maine. Killed in a CH-46E helicopter crash on March 20 in Kuwait. Assigned to the Marine Aviation Weapons and Tactics Squadron --1, 3rd Marine Aircraft Wing, Marine Corps Air Station, Yuma, Ariz.

Capt. Ryan Anthony Beaupre, 30, of Bloomington, Ill. Killed in a CH-46E helicopter crash on March 20 in Kuwait. Assigned to the Marine Medium Helicopter Squadron -- 268, 3rd Marine Aircraft Wing, Marine Corps Air Station, Camp Pendleton, Calif.

Sgt. Michael E. Bitz, 31, of Ventura, Calif. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 2nd Assault Amphibious Battalion, 2nd Marine Division, Camp Lejeune, N.C.

Lance Cpl. Brian Rory Buesing, 20, of Cedar Key, Fla. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 1st Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

2nd Lt. Therrel S. Childers, 30, of Harrison County, Miss. Killed in action on March 21 in southern Iraq. Assigned to the 1st Battalion, 5th Marine Regiment, 1st Marine Division, Camp Pendleton, Calif.

Lance Cpl. David K. Fribley, 26, of Fort Myers, Fla. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 1st Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Cpl. Jose A. Garibay, 21, of Orange, Calif. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 1st Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Cpl. Jorge A. Gonzalez, 20, of Los Angeles. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 1st Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Lance Cpl. Jose Gutierrez, 22, of Los Angeles. Killed in action on March 21 in Southern Iraq. Assigned to the 2nd Battalion, 1st Marine Regiment, 1st Marine Division, Camp Pendleton, Calif.

Sgt. Nicolas M. Hodson, 22, of Smithville, Mo. Killed in a vehicle accident in Iraq on March 24. Assigned to the 3rd Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Cpl. Evan James, 20, La Harpe, Ill. Drowned while trying to cross the Saddam Canal in southeastern Iraq on March 24. Reservist with the Naval and Marine Corps Reserve Center, Peoria, Ill.

Pfc. Howard Johnson II, 21, of Mobile, Ala. Killed when ambushed by enemy forces in Iraq March 23. Assigned to the 507th Ordnance Maintenance Company, Fort Bliss, Texas.

Hospital Corpsman Third Class Michael Vann Johnson, Jr., 25, of Little Rock, Ark. Killed in action March 25 in Iraq. Assigned to Naval Medical Center, Third Marine Division Detachment, San Diego.

Staff Sgt. Phillip A. Jordan, 42, of Enfield, Conn. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 1st Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Cpl. Brian Matthew Kennedy, 25, of Houston. Killed in a CH-46E helicopter crash on March 20 in Kuwait. Assigned to the Marine Medium Helicopter Squadron — 268, 3rd Marine Aircraft Wing, Marine Corps Air Station, Camp Pendleton, Calif.

Marine Sgt. Brad Korthaus, 29, of Davenport, Iowa. Drowned while trying to cross the Saddam Canal in southeastern Iraq on March 24. Assigned to Engineering Company C, 6th Engineer Support Battalion, 4th Force Service Support Group, Peoria, Ill.

Lance Cpl. Eric J. Orlowski, 26, of Buffalo, N.Y. Killed by an accidental discharge of a .50 cal machine gun in Iraq. Assigned to the 2nd Tank Battalion, 2nd Marine Division, Camp Lejeune, N.C.

2nd Lt. Frederick E. Pokorney Jr., 31, Nye, Nev. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the Headquarters Battery, 1st Battalion, 10th Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Cpl. Randal Kent Rosacker, 21, San Diego. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 1st Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Army Spc. Gregory P. Sanders, 19, of Hobart, Ind. Killed in action March 24 in Iraq. Assigned to the 3rd Battalion, 69th Armor, Fort Stewart, Ga.

Army Capt. Christopher Scott Seifert, 27, of Williams Township, Pa. Killed by a grenade while sleeping in a tent at Camp Pennsylvania, Kuwait, on March 22. Assigned to the 101st Airborne Division, Fort Campbell, Ky.

Air National Guard Maj. Gregory Stone, 40, of Boise, Idaho. Died on March 25 from wounds received by a grenade in a tent at Camp Pennsylvania, Kuwait, on March 22. Assigned to the 124th Air Support Operations Squadron, Idaho Air National Guard, Boise, Idaho.

Lance Cpl. Thomas J. Slocum, 22, of Thornton, Colo. Killed in action March 23 in the vicinity of Nasiriyah. Assigned to the 1st Battalion, 2nd Marine Regiment, 2nd Marine Expeditionary Brigade, Camp Lejeune, N.C.

Army Reserve Spc. Brandon S. Tobler, 19, of Portland, Ore. Killed in a non-hostile vehicle accident March 22 in Iraq. Assigned to the 671st Engineer Brigade, Portland, Ore.

Staff Sgt. Kendall Damon Watersbey, 29, of Baltimore. Killed in a CH-46E helicopter crash on March 20 in Kuwait. Assigned to the Marine Medium Helicopter Squadron, 3rd Marine Aircraft Wing, Marine Corps Air Station, Camp Pendleton, Calif.