In new york city, uniformed policemen stand quietly outside hotels, concert halls and shopping centres. The air in subways and traffic tunnels is being tested for contamination. So is milk and fresh food. Streets leading into large buildings, such as Grand Central Station, have been closed. On others policemen pull over vehicles, particularly with non-New York licence plates, to question drivers. Bomb scares have reappeared in the city. It is all horribly reminiscent of the traumatic weeks after September nth 2001.
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