After the September 11 terrorist attacks:
- 4,167 apartments requested cleanup and testing. 1.4 million Americans changed 2001 holiday travel plans.
- 422,000 New Yorkers were estimated to suffer from post-traumatic stress disorder.
- 2,753 people were killed in New York. 343 firefighters and paramedics were killed. 1,609 people lost a spouse or partner and 3,051 children lost a parent.