The following is a list of the deadliest helicopter crashes in Iraq since March 2003:

— Aug. 22, 2007: A UH-60 Black Hawk helicopter crashed in northern Iraq, killing all 14 U.S. soldiers aboard. The military said initial indications showed the aircraft experienced a mechanical problem and there were no indications of hostile fire.

— Jan. 20, 2007: A Black Hawk helicopter crashed in Diyala province northeast of Baghdad, killing 12 American soldiers aboard.

— Jan. 7, 2006: A Black Hawk helicopter carrying eight U.S. troops and four American civilians crashed near the northern city of Tal Afar, killing all aboard.

— April 21, 2005: A Bulgarian-owned MI-8 helicopter was shot down by missile fire 12 miles north of Baghdad, killing 11 people — six American bodyguards for U.S. diplomats, three Bulgarian crew members and two security guards from Fiji.

— Jan. 26, 2005: A CH-53 Sea Stallion transport helicopter crashed in a sandstorm in western Iraq, killing 30 Marines and a U.S. sailor.

— Nov. 15, 2003: Two Black Hawks crashed in Mosul, killing 17 soldiers. The military said the helicopters collided during a likely rocket-propelled grenade attack.

— Nov. 2, 2003: A Chinook transport helicopter was shot down near Fallujah, killing 15. The military believed a SA-7 shoulder-fired missile struck an engine.

— March 30, 2003: A Sea Knight crashed in Kuwait, about nine miles from the Iraq border, killing eight British troops and four U.S. Marines. No hostile fire was reported in the area.