With September 11th, it makes me think of the Gary Moore song "Murder In The Skies". I know the song is about the Russians shooting down a Korean plane (it's 35th Anniversary was back on September 1st) but despite that and the fact it was written in 1983, it can almost be a September 11th song with the chorus being
"Murder In The Skies, Came Without a Warning
Murder In The Skies, Black September Morning".
Murder In The Skies, Black September Morning".
I know Gary was Irish but it would've been interesting to do a September 11th version.