The backpacks are rigged with cameras that technicians can use to snap Street View images of hiking trails and other wilderness locations, such as national parks.

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Despite their exposure to losses, Wall Street firms may end up on top when the dust settles by being able to snap up loan portfolios at a steep discount.

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Mr Kitzenberg's bedroom on Laurel Street gave him a bird's eye view of the battle that erupted and he used his position to snap a series of images.

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