Many went to Ground Zero on their own, and entire departments filled in at city firehouses left vacant.
Being so physically close to Ground Zero, tourism and business has been very slow to return to the area.
The Hawk would be on his way to Ground Zero!
Every day a retired firefighter returns to Ground Zero, to feel closer to his two sons who died there.
If anyone who's been to Ground Zero and could reply, that would be great.
Companies used to dealing with more traditional approaches have also given business to Ground Zero.
Too often, discussions about the health of these workers have met with official denials that their problems can be directly linked to Ground Zero.
Still, the closer the convoy got to Ground Zero, the more evidence of activity there was.
We didn't have the skills to go down to Ground Zero and help with recovery efforts.
One week later, under pressure from those who disliked the name, he changed it to Ground Zero.