The report shows that people from all 50 states and the District of Columbia have enrolled in the World Trade Center Health Registry. According to the report, thousands of Americans from throughout the country were in the immediate vicinity of Ground Zero in the months following 9/11 and have since signed up for the Registry, which will track changes in their physical and mental health over the next 20 years. The City of New York compiled the data and released it at Maloney's and Fossella's request.