This example visualizes the top 9 nuclear-armed countries by their 2020 warhead counts using a horizontal bar chart. It employs React and D3.js v5 to render SVG marks and channels, with a green color scheme and red bars, and includes axis ticks and labels. The data is loaded from a CSV file using `d3.csv`, and the scales are created with `scaleBand` and `scaleLinear`. The chart displays a title and country names along the categorical axis, with the numeric axis representing the nuclear weapon counts.