In september and october 2006 was voted the Secure Fence Act by the US Congrete and Senate which "allows for over 700 miles of double-reinforced fence to be built across cities and deserts alike between California and Texas in areas that have been prone to illegal drug trafficking and illegal immigration. It authorizes the installation of more lighting, vehicle barriers, and border checkpoints, while putting in place more advanced equipment like sensors, cameras, satellites and unmanned aerial vehicles in an attempt to watch and control illegal immigration into the United States. Officials say that it will help cut down on the number of illegal vehicles that go back and forth across the border bringing illegal drugs." (White House communication)
How crazy it is to observe that a wall is just a line on a map but what is resulting from this line are the most consequential political decisions acting on life of thousand of people. I could have put some more pictures of Berlin Wall, Cisjordan Wall or the Indian-Kashmir Wall, but I think that this "line effect" can be also observed on smaller scales, and architects have to be deeply aware of it.