A major health study is being conducted on children affected by a significant event. The study focuses on the health of children who lived or attended school near the World Trade Center towers when they were brought down by hijacked planes.

About 25,000 children were in the area at that time. Further details on the study are available from the source.

The study aims to investigate the health impacts on these children, although specific details on its scope and methodology are not provided here. For more information, readers can refer to the original source.