This histogram visualizes the total number of dead and disappeared migrants over time, using a time-based x-axis and a count-based y-axis. The code loads CSV data from a GitHub gist, bins the data by month using `d3.bin` with `timeMonths` thresholds, and sums the casualties per bin. React components render SVG axes and rect marks for each bin, with tooltips showing values via `<title>` elements. D3's `scaleTime` and `scaleLinear` handle scaling, while `csv` fetches and parses the dataset.