A poem by one of my favorites, e.e. cummings. It’s not about 9/11, but I find meaning in it. I hope you will too.

this(let’s remember)day died again and
again;whose golden,crimson dooms conceive

an oceaning abyss of orange dream

larger than sky times earth:a flame beyond
soul immemorially forevering am-
and as collapsing that grey mind by wave
doom disappeared,out of perhaps(who knows?)

eternity floated a blossoming

(while anyone might slowly count to soon)
rose-did you see her?darling,did you(kiss
me)quickly count to never?you were wrong

-then all the way from perfect nowhere came

(as easily as we forget something)
livingest the imaginable moon