This example displays a static choropleth map of the United States, with all states uniformly filled in red on a light yellow background. Using D3 v4 and TopoJSON, it loads state boundaries from the `us-atlas` dataset and renders them as SVG paths with `d3.geoPath` and the `d3.geoAlbersUsa` projection, which automatically positions Alaska and Hawaii. The code applies stroke styling to delineate state borders, offering a simple baseline for geographic data visualization.