P AUL Deakin studied the pictures of the 9/11 terrorists with disbelief as he realised that among them was the man who had become his friend.For four weeks the maths teacher from the North of England and Ziad Jarrah, the man who seized controls of the fourth hijacked plane that crashed in Pennsylvania, had shared a bungalow as they learned how to fly in Florida.They had watched Friends together on TV and gone out to local bars at weekends to play pool.But while all Paul had wanted was a private pilot's licence Jarrah had another purpose. He was to become...