A line chart displaying cumulative global COVID-19 deaths over time, with a red marker line at the 1 million death threshold. Built with React and D3 v5, it uses `scaleTime` and `scaleLinear` to map dates and death totals, with `line()` generating the SVG path. Data comes from the John Hopkins Coronavirus dataset, aggregated by summing daily death totals across all countries. Gridlines from `axisBottom` and `axisLeft` provide reference, while the marker annotations label the 1M threshold and its corresponding date.