owen bennett—jones finds the pakistan army back in control of the tribal area on the afghan border, after huge military operation to clear out al-qaeda and the taliban. around one million people from north waziristan fled when the conflict was at its height, and the question now is will they come back? making china's skies blue again. carrie gracie investigates beijing's new measures against old polluting vehicles. the chinese economy is still fuelled by coal. and in the one party state there is little the public can do, to force the politicians here to deliver air fit to breathe. and the beauty of the brain. fergus walsh meets the researchers unlocking the science of thought. the tribal areas on the afg han—pakistan border have long been associated with militancy and lawlessness. the ancient tribal customs, with their emphasis on both revenge and hospitality, have been challenged in recent years by violentjihadis, imposing sharia, not tribal law. north waziristan became home to al-qaeda, the taliban, and jihadists from all over the world, but as owen bennett—jones reports, after a long a

owen bennett—jones finds the pakistan army back in control of the tribal area on the afghan border, aftertaliban. around one million people from north waziristan fled when the conflict was at its height, and the question now is will they come back? making china's skies blue again. carrie gracie investigates beijing's new measures against old polluting vehicles. the chinese economy is still fuelled by coal.