"The main issue to assess is whether the Algerian event represents a new ongoing threat and a general associated elevation in the risk environment or a one-off occurrence which may now result actually in tighter security in the region, " says Nick Robson, the head of Jardine Lloyd Thompson's credit, political and security risk business.

CNN: Oil and gas industry reviews security

My platoon was going to be fast roping directly onto a platform a couple hundred yards from the main building and my first task was to control the fast rope and direct the pilots into the right position and elevation.

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