An interactive stacked bar chart shows contributions to US GDP growth from 1950 to 2017, broken down into categories like personal consumption, investment, net trade, and government spending. The visualization uses D3.js version 4.11 with an animated drill-down feature: clicking a bar segment expands that category into its sub-components, such as goods versus services or exports versus imports. A back button returns to the overview. The y-axis represents percentage points, and hovering displays tooltips with exact values. The chart is rendered as an SVG using `d3.scaleBand`, `d3.scaleLinear`, `d3.stack`, and `d3.axis` functions.