Executives have cited the difficulty of that task as a key reason for the long lead-up to the new pay system and have been testing and debugging the system.

WSJ: New York Times Prepares Plan to Charge for Online Reading

Whatever steps are taken, or probably not taken, the key task remains that set out in Ehud Yaari's January report, as he put it, "to minimise the risk of the Israeli-Egyptian peace treaty imploding under the pressures of the wild Sinai frontier".

BBC: Sinai attack marks step change in border violence

Every now and then, characters have to perform a task that could alter the story's events, such as hunting down a key card to stop a speeding train.

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