This example displays a choropleth-style map of the United States with state boundaries and graticules rendered as SVG paths. The map uses the Albers USA projection via `d3.geoAlbers` and `d3.geoPath`, with `d3.geoGraticule` for the background grid. Data comes from the US Atlas TopoJSON file, processed with `feature` and `mesh` from topojson to create land and interior state borders. React manages the component state and rendering, while CSS styles the land as green and the interior borders as red.