This visualization displays nuclear warhead stockpiles for the US, Russia, UK, France, and China from 1945 to 2020, using a multi-line chart with a power scale on the y-axis. The lines are rendered as SVG paths with d3.line and curveBasis. Users can zoom and pan along the x-axis via d3.zoom, which rescales and redraws the lines through an update function. Hovering highlights a line, while clicking toggles its visibility.