This visualization shows the number of flights per country as a bar chart, with each bar colored by country and sized proportionally to the flight count. It uses the Vega-Lite API to encode the data, with country on the x-axis and an aggregated count of flights on the y-axis, displayed as bars with a fixed size and full opacity. The data is loaded asynchronously via d3.csv from a raw GitHub dataset, and the chart is rendered to SVG using the Vega-Lite runtime with a custom config for axis styling and tooltip support.