I get knocked down, but I get up again
There have been a couple of pieces of music that I'm aware of which were inspired by the event of eleven years ago. Here they are. First Steve Reich's WTC 9/11:
Then John Adams's On The Transmigration of Souls:
And while this last piece (Mahler's Symphony No 2 "Resurrection") was composed long before the World Trade Center was even built, the lyrics of its final section seem highly appropriate, and the music is the kind of send-off all the victims deserve. And it's conducted by (in my opinion) one of the greatest New Yorkers who ever lived, Leonard Bernstein, in a performance from the 1974 Edinburgh Festival (in St Mary's Episcopal Cathedral).
Mit Flügeln, die ich mir errungen
Werde ich entschweben.
Sterben werd' ich, um zu leben!
Aufersteh'n, ja aufersteh'n
wirst du, mein Herz, in einem Nu!
Was du geschlagen
zu Gott wird es dich tragen!
With wings which I have won for myself,
I shall soar upwards.
Die shall I in order to live.
Rise again, yes, rise again,
Will you, my heart, in an instant!
That for which you suffered,
To God will it lead you!
You can watch the whole performance here.