Vulnerable Cities

Function of a CityThe largest and best known cities contain large populations, high value assets, a capacity to connect the world and a strategic location.  Within this bounded territory cities allow for the production of things and the conduct of social life.   Human mobility, interaction and information flow are keys to sustaining its dynamic.  Cities are knit together through an immense infrastructure of highways, bridges, tunnels, railways, metros, reservoirs, communications lines and more.  Each day people travel throughout these urban communities safely and with relative efficiency.  Finances flow, goods are manufactured, commodities delivered, and negotiations are transacted in myriad ways. Almost always airports work, hospitals function, the courts enforce the law and universities carry out their business. We tend to take this for granted. Photo: Copenhagen Metro, 2009.  http://www.flickr.com/photos/-skipper-/3739130898/Cities are…

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