An international hunt is on to find a flying bomb – a stolen Boeing 727 – which led to British Airways canceling all flights to Saudi Arabia last week. The plane is a fuel tanker that MI6 and other spy agencies fear is in the hands of al-Qaeda. The search is being coordinated by Richard Dearlove, director of MI6, and George Tenet, the CIA chief. Both President Bush and Tony Blair, on holiday in Barbados, are being kept updated on the search – one of the most difficult in aviation history. Hidden somewhere in the vast Sahara desert of...