This example shows an interactive zoomable and pannable tree diagram that visualizes the hierarchical structure of the flare JSON dataset. The visualization supports drag-and-drop repositioning of nodes, with ghost circle indicators and animated path updates during the operation. Built with D3 v3, it uses `d3.layout.tree`, `d3.svg.diagonal`, and `d3.behavior.zoom` to render SVG nodes and links. The diagram automatically sorts nodes alphabetically and includes panning near the viewport edges while dragging.