This interactive map of the United States plots ten major cities as red circles, scaled by their netflow values. A click on any city draws semi-transparent black lines connecting it to all other cities, visually comparing its position relative to the entire set. Built with React and D3, the visualization uses a geoAlbersUsa projection from `d3.geoPath` to render the states, while mouseover transitions animate circle size and color, and the `topojson` library converts US Atlas data for state boundaries.