The Telegraph reports: When a raiding party from Islamic State of Iraq and the Levant attacked a Saudi border post last week, it was no mere hit on a desert outpost.

The jihadists were launching an assault on the new, highest-profile effort by Saudi Arabia to insulate itself from the chaos engulfing its neighbours.

The Saudis are building a 600-mile-long “Great Wall” — a combined fence and ditch — to separate the country from Iraq to the north. [Continue reading…]