This fork of the "Cheap Tricks for Interaction" example displays world countries on an orthographic projection, colored by continent using an ordinal color scale. The map is built with `d3.geoPath` and data from `world-atlas`, with country names from a matching TSV file. A custom drag interaction, implemented via `d3.drag`, allows users to move a temporary green rectangle across the screen, while the underlying sphere rotation code remains commented out.