One of the many reasons also Brian why offshore installations have a 3 mile exclusion zone around them. Am sure if was possible they would also have a wall built round them. Walls have been built since time began to keep out undesirables. This modern day thinking by the so called peace loving people preaching brotherly or sisterly love, hope they have the guts to stand up and pay the bill in others lives when it comes due. Most houses here in Oz are built with open plan gardens. I notice a lot now are building walls around their property’s. It’s not to keep the kangaroos out, as they are being decimated by the amount of new buildings and their habitats are being destroyed. I’m all for building walls at borders. Of course there is the other alternative and cheaper option , lay landmines, just watch and listen then to the screams worldwide. With the exception of the Berlin Wall which we were told was to keep the Germans in the Russian zone, one never heard any opposing arguments from the USSR now that would have been a noteworthy news item, to show the other side of the coin. JS