The gated complex includes blast doors, reinforced windows and a series of metal detectors that visitors must navigate before reaching embassy offices.

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The train carriages, each carrying 62 passengers seated at comfortable booth-style tables, are surprisingly lofty, with large windows and a dash of industrial chic via the solid metal crossbeams near the ceiling.

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The door and ground floor windows of the house in Leyton Road have been covered with metal shutters.

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Thursday's blast was so powerful it damaged dozens of surrounding buildings, ripping metal shutters and shattering windows.

WSJ: Deadly Blast Hits Afghan Capital

Thursday's blast was so powerful it was felt across the city and damaged dozens of surrounding buildings, ripping metal shutters and shattering windows.

WSJ: Deadly Blast Hits Afghan Capital

You could see into the other empty classrooms through the matrix of windows that formed walls around them, supported by bright orange metal framing.

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His company, EverSealed Windows, based in Colorado, has patented a metal baffle bonded to both sheets of glass that allows them to expand and contract separately, while maintaining a vacuum that he says will last for decades.

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