This example visualizes the flight route network for each airline from a CSV dataset, using a force-directed layout. Nodes represent individual airports, while lines depict the connections between them, colored in the airline’s signature maroon. The visualization is built with D3.js v5 and renders as an SVG. It employs `d3.forceSimulation` with `d3.forceLink`, `d3.forceManyBody`, and `d3.forceCenter` to position the nodes. The code also integrates `d3.ForceEdgeBundling` to bundle edges, reducing visual clutter in the dense network.