This example renders a simplified choropleth of the United States using a static grayscale fill for each state. It loads TopoJSON data from the `us-10m.v1.json` file and converts it to GeoJSON features with `topojson.feature`. The map is drawn as SVG paths using a `d3.geoAlbersUsa` projection and a `d3.geoPath` generator, with each state assigned a light gray class. No interactivity or zoom behavior is implemented, despite the README noting an unsuccessful attempt at state zooming.