This histogram visualizes COVID-19 deaths over time across all California counties, aggregated into monthly bins that show the total deceased and missing per month. Built with React and D3 v6, the chart uses `d3.histogram` with `timeMonths` thresholds to bin data, `scaleLinear` and `scaleTime` for axes, and SVG rect elements for bars. The data comes from the JHU CSSE COVID-19 time-series dataset, with each bin summing the daily death totals by county.