Flat tire during lunch run

Today's (*) flat tire actually had a reason (all previous flats on this bike have been due to snakebite - which I've pretty much eliminated by keeping the tires well inflated and changing my riding style to less in the gutter so I'm not hitting rough bits as much).

Looks a bit like a steel wire from a wire brush or something. Does not look like a wire from a tire band.

(*) this was from September 4. I changed the post date but this is not reflected in the post for some reason.