Passenger buses are seen near Northwest flight 253 on the tarmac at Detroit Metro Airport in Romulus, Michigan December 27, 2009. CNN said crew members requested emergency assistance upon landing after reporting a disruptive passenger. The plane landed safely in Detroit. This was the same flight number as the one involved in the Christmas Day incident in which a Nigerian man was charged with attempting to blow up the Northwest passenger jet. REUTERS/Rebecca Cook
(UNITED STATES - Tags: CRIME LAW TRANSPORT POLITICS CIVIL UNREST)