Here are some images referencing 9/11 from graffiti and street art around the world. All photos via Flickr.

Shot in Argentina by Paul Keller

Shot in NYC by leojam

Shot in Weimar by mightymightymouse

Shot in Second Avenue F train station, NYC by Linus Gelber

Shot in NYC by leojam

9/12/01, somewhere in the West Village by QXZ