This choropleth map displays the crime rate per 100,000 people across U.S. states, using a sequential blue color scale where darker shades indicate higher rates. Hovering over a state reveals a tooltip with the exact value, while states without matching data appear gray. The visualization loads CSV data and U.S. TopoJSON boundaries, then renders them as SVG paths via `d3.geoPath` with an Albers USA projection. It uses D3 v7 for data binding, color encoding, and interactive tooltips, with state names normalized and matched against FIPS codes for labeling.