This bar chart tracks daily COVID-19 deaths across ten countries throughout May 2020. A slider allows viewers to select a specific day of the month, updating the bar lengths to show new deaths reported that day. The visualization uses React with D3 v5’s `scaleBand` and `scaleLinear`, rendering SVG rectangles via the `Marks` component. Data comes from the COVID May Dataset, filtered by country and month day, with hover tooltips displaying country names and death counts.