This map shows the US map with county-lines where blue indicates that there's an AF base. But not quite. Some counties have more than one base and I wanted to show all the bases on the map. In hindsight, that wasn't the best way to go about it. Obviously not as impressive as the original example from stevenae/8362841, but I just wanted to get a map working at the time.
I also learned a lesson here. While looking at a choropleth is fun and impressive (for the stevenae's case) if well-made, you really have to ask yourself: Do you really want to show your data on a map? I've gotten several request to show base manning level on a map, but choropleth was not the best way to go about it, especially the county level map (Imagine this US county map sparsely colored with shades of red and blue)
Modified http://d3js.org/d3.v3.min.js to a secure url
Modified http://d3js.org/queue.v1.min.js to a secure url
Modified http://d3js.org/topojson.v1.min.js to a secure url
Modified http://cdnjs.cloudflare.com/ajax/libs/crossfilter/1.3.1/crossfilter.min.js to a secure url
Modified http://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js to a secure url
https://d3js.org/d3.v3.min.js
https://d3js.org/queue.v1.min.js
https://d3js.org/topojson.v1.min.js
https://cdnjs.cloudflare.com/ajax/libs/crossfilter/1.3.1/crossfilter.min.js
https://labratrevenge.com/d3-tip/javascripts/d3.tip.v0.6.3.js