This bar chart shows the total count of nuclear explosions per country, with each bar representing a nation and its length corresponding to the number of deployments. It uses Vega-Lite via the vega-lite-api to declare the bar marks and encodings, while D3’s csv loader fetches the data from a remote GitHub gist. The visualization is rendered through Vega’s SVG view, with a custom tooltip handler for interactive inspection and customized axis and label styling.