This network graph visualizes conceptual flight routes connecting major hub cities (New York, London, Dubai) with smaller cities using a force-directed layout in D3 v7. The SVG rendering uses `d3.forceSimulation` with `forceLink`, `forceManyBody`, and `forceCenter` to position nodes dynamically. Major routes are distinguished by thicker, blue strokes, while hubs appear as larger, teal circles. City labels accompany each node, with drag interaction enabled via a custom drag function.