I think the NYT has redone this interactive piece like 50 times now.

mbostock · on May 22, 2014

Surely you jest! The previous version was four years ago (in 2010) and was implemented in Flash. Screenshot:

polskibus · on May 22, 2014

Congrats for a article on the NYT! I can't see whether D3 is used or not - can you shed some light on what did you use?

cwang912 · on May 22, 2014

I think he's the guy that created D3, so I'm guessing that's what he used. (Or at least I'm pretty sure...)

caseyf7 · on May 23, 2014

I'm looking forward to seeing more flash replaced with d3!

aet · on May 22, 2014

My bad