Goats eating the grass implies that the green stuff growing around the buildings is grass. I've seen enough government facilities to know that they don't spend much money on weeding, fertilizer, etc.

And getting back to the original thread -

When is some contry going to invade the U.S. to get rid of our weapons of mass destruction?

And when are our generals, etc. going to be brought up on war crimes at the Hague?