Azimuthal equidistant map projection with the center @ Washington DC/Pentagon.
It has the useful properties that all points on the map are at proportionally correct distances from the center point, and that all points on the map are at the correct azimuth (direction) from the center point.
The UN map is similar with the centerpoint set at the north pole.
https://en.wikipedia.org/wiki/Azimuthal_equidistant_projection