In the latest of his online terrorist dispatches, The Observer's Chief reporter reveals another embarrasing failure for the security services.The Americans believe that Abu Al-Haili helped to arrange OBL escape from Tora Bora.So why did security services allow him to slip through the net in Tooting, South London. According to well-placed sources within the Islamist community in the UK Abu Zubair al-Haili - who the Americans believe helped Osama bin Laden escape the American assault on Afghanistan - was living in the UK until shortly before the September 11th attacks.