Already a sand-bank, a trench and an electrified fence guard the 200-kilometre-long border.

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When a uniformed Secret Service guard asked if he could help him, the man began walking along the fence toward the guard.

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Lord Wimborne had a positive duty to protect the boy from the cog-wheels by ensuring there was a safety guard or fence.

BBC: UK

The US Coast Guard has now established a security zone in the waters around the base, and the perimeter fence has been strengthened.

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