This mod attempts to make the downtown D.C. area feel more post apocalyptic, by adding things like vehicles, rubble, craters etc. However, the changes are not too extensive at the moment.

Version 2 - Added more vehicles on the roads around the city and cleaned with Fo3Edit

At the moment I have not edited the Navmesh, but have tested it with multiple NPC's and they all seemed to get on fine, although please let me know if anyone finds any problem areas.
Screenshots show some before and after.

Does not conflict with D.C Interiors.
Influenced by post apocalyptic concept artwork and films.