This example visualizes airline passenger data by country, gender, and total flights. A scatterplot encodes country on the x-axis, total flights on the y-axis, and uses circle size to represent flight counts, with gender distinguishing color and tooltips revealing passenger names. The visualization uses vega-lite-api to construct the specification, with vega and vega-lite rendering the chart, while d3.csv loads the dataset from a GitHub repository. The config module customizes axis and label styling for improved readability.