This means that when the vehicles come across a particularly steep or slippery slope, they can anchor themselves with five of the wheels and inch each wheel forward one at a time, to crawl over an obstacle.

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Night has turned to day and the swift journey through a sparkling city of a few hours ago has been replaced by a grim crawl through traffic clogged streets, time again to reflect on what it must be like in the eye of the storm across the Atlantic.

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Yet, if North Korea wants a new start in relations with the South, this is as safe a time as any for it to crawl out of its bunker.

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