This map visualizes the total violent crime rates across U.S. metro areas from 1975 to 2015, with each city represented by a semi-transparent circle positioned by latitude and longitude. The visualization layers a geographic outline of U.S. states over the data points, using a color encoding to differentiate crime rates and years. Built with Vega-Lite and rendered through the vega-lite-api, the map employs an Albers USA projection and fetches crime data from a CSV file, while state boundaries come from a TopoJSON source. The tooltip feature provides detailed city information on hover.