The Pakistani ambassador to Afghanistan, Tariq Azizuddin, has appeared on a video aired by the al-Arabiya news channel. The ambassador, who disappeared in February, says he is being held captive by the Taliban. He asked the Pakistani government to meet any demands made by the Taliban to secure his release. Mr Azizuddin and his driver disappeared in northwestern Afghanistan on 11 February. They were travelling from Peshawar to the Afghani capital Kabul. ...