? New York City officials are mailing out surveys to thousands of Bronx and city residents to track the health affects of the September 11th terrorist attacks.

The more than 71,000 people enrolled in the World Trade Center Health Registry will get the survey. Officials hope the results will help them keep better records of problems many survivors are reporting, such as respiratory and mental illnesses.

Health officials plan to send follow-up surveys over the next two years.

Related InformationWorld Trade Center Health Registry