Jacqui, are you sure you don't mean Ground Zero which is the site of Twin Towers and where all the photos of people still missing and their stories were posted on railings of a small church alongside Ground Zero.
We went to New York exactly 6 months to day the after 9/11 (booked beforehand by the way, not just to go and see the devastation it caused) We also saw Ground Zero and it affected me too, but 9/11 is merely the date of the attacks, I've never heard the site referred to that way.