a tank beriah disguised as a palm. together with the already present security cameras these structures form a security ring around the city of london. remarkably enough. it's followed almost the exact same lines of the old city walls dating back to roman times the ring of steel is a bold new fortress a matrix for other cities the projects about the ring of steel was primarily to make it visible so that people understood how to read the landscape i think that's what i find most interesting about the ring of steel is because it was so keen to not have this very visible defense it is not like a very mobile that way you can find it and see it very easily so we really wanted to explain to people like three mapping through photographs and also through guided tours how to find it and how to be able to analyze what you were looking at and to understand how the system was operating. ninety nine hundred three a truck with sixteen tons of explosives detonates of the city of london the oil rig brings terror to the capital and demo