Cases involving individuals who have been injured in crashes and collisions involving helicopters. A Helicopter Accident is an occurrence associated with the operation of an aircraft which takes place between the time any person boards the helicopter with the intention of flight and all such persons have disembarked, in which a person is fatally or seriously injured, the aircraft sustains damage or structural failure and/or the aircraft is missing or is completely inaccessible.
Cannon Ball is a census-designated place (CDP) in Sioux County, North Dakota in the United States. It sits in the northeastern part of the county where the Cannonball River meets Lake Oahe of the Missouri River. The population was 864 at the 2000 census.