Reuters Pictures
Police drive an off-road patrol vehicle through a checkpoint on a road near the Saudi border in the western Yemeni province of Hajja October 10, 2009. The dramatic cliffs and mountains in the border region show the uphill challenge Saudi Arabia faces to stop al Qaeda militants slipping in from its poor neighbour Yemen. Worried mainly about al Qaeda using Yemen as an operating base, Saudi Arabia plans to build a high-tech fence system costing billions of dollars with night cameras, heat sensors, air and sea surveillance to seal off the kingdom's borders. Picture taken October 10, 2009.