I also restrained the amount of graphs. There is quite a lot of output that can be derived from this dashboard because graphs behave interactively.
The “Choose metric” is related to a DAX formula which changes the output, based on which metric you select. This is by far the only big DAX development done.
The Country US is added to the map to make sure we only see US countries. There are helpful comments from somebody Greg and JarrettM on the challenge that explain how to do this.