This interactive visualization combines a world map with a time-series histogram to explore migrant deaths and disappearances. A brushed time range on the histogram filters the map’s proportional circles, which encode total deaths per location, using `d3.brushX` for fast linked updates. The map uses `d3.geoNaturalEarth1` and `d3.geoPath` for country boundaries, while the histogram bins monthly totals with `d3.histogram`. Data comes from the Missing Migrants Project CSV, and React’s `useMemo` optimizes rendering performance.