I don't live over there, but remember well the awful day when we sat and watched on TV the events unfolding before our eyes.
I was impressed by Tom Paxton's tribute to the firefighters in his song "The Bravest", and wrote an extra verse in 2004 after some further news coverage.(Tom, please forgive me.)

Now three years on at Ground Zero they'll build another tower
In honour of all those who died in America's darkest hour
They're going to call it Freedom, they're building it for life,
In hopes that all may see an end to terror, war and strife.