This visualization shows a force-directed network graph of social connections from the Caltech36 Facebook dataset, rendered as SVG circles and lines. The simulation uses `d3.forceSimulation` with `d3.forceManyBody`, `d3.forceCenter`, and `d3.forceLink` to position nodes colored with a rainbow sequential scale. The code loads node and link data from a local JSON file, then applies ticked updates to redraw node positions and link endpoints as the layout stabilizes.