fresh block
This example overlays a red geodesic circle around Pyongyang on a world map, using an azimuthal equidistant projection to show the range of a missile strike as a consistent distance on the globe. It also draws a red line between Pyongyang and Washington, D.C., with red points marking both cities. The visualization uses D3 v4 with `d3.geoCircle`, `d3.geoPath`, and `d3.geoAzimuthalEquidistant` to render SVG paths. Country boundaries come from a GeoJSON file loaded via `d3.json`, while the sphere outline and projected features are drawn as SVG path elements.