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.
Greenbelt is a city in Prince George's County, Maryland, United States. Contained within today's City of Greenbelt is the historic, planned community now known locally as "Old Greenbelt" and designated as the Greenbelt Historic District. Greenbelt's population was 21,456 at the 2000 census.