> You have to get approval to use the likeness of a building? Why, Jebus, why?
It's crazy, but not as crazy as: The next time you are in a foreign country that has a US embassy, stand in front of it and try to take a picture (of the embassy). Watch the plain clothes guys encircle you and destroy your camera.
After you complain etc, you'll be informed that due to national security of the USA, you aren't allowed to take photos, When you complain to your local government you'll be forwarded to the ministry of exterior affairs, there you'll be told due to some convention they can't name specifically (Geneva/Hague, etc) [insert country here] has additional verbal agreements, of which is the US's wish to have NO NEW photos taken of their embassies on foreign soil.
[example one of the very few pictures of the US Embassy in Colombia that exist] You'll notice fewer and fewer images available online of almost all foreign US Embassies.