McCartney, who said the attacks affected him emotionally, wrote the song the day after the attack.
Since the towers fell, there has been much debate about how the terrorist attacks and their aftermath will affect popular culture.
First consider commercial real estate, which the attacks affected directly.
The terrorist attacks may well have affected or partly distorted the data on hours worked, economists said.
After this she'll be so popular that any attack on her will only enhance her and affect us negatively.
"Any attack on our operations will affect the local economy."
But the attacks have affected even those who go ahead with their weddings.
The terrorist attacks affected virtually every means of coming and going in the country.
The attacks affected a Jewish community that is struggling to stay alive and strong as its numbers decline.
It was unclear how the attack would affect his travel plans.