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This visualization shows the under-18 population living in poverty across U.S. counties in 2014, using red semi-transparent bubbles overlaid on a map. Bubble size encodes population via a square-root scale, and tooltips display county names and populations on hover. The map is built with D3.js, using `d3.geo.path` for rendering topojson shapes, `d3.svg.arc` for bubble outlines, and `d3.json` to load data from a GitHub-hosted JSON file. The SVG output animates state borders and bubble hover effects.