Authorities are treating the stabbing of a police officer at an airport in Michigan as an act of terrorism. The suspect, Amor Ftouhi, 50, shouted "Allahu Akbar" ("God is greatest" in Arabic) before knifing the officer in the back and neck, said officials. Lieutenant Jeff Neville is in a stable condition in hospital after Wednesday morning's attack at Bishop International Airport in Flint. Lt Neville helped take the suspect, a “Canadian”, into custody at the scene. Security camera footage showed Mr Ftouhi loitering at the airport with baggage before pulling out a 12in (30cm) blade and carrying out the attack in a non-secured, public area. Lt Neville was standing at the top of the escalators when he was approached from behind and knifed at shortly after 09:00 local time (13:00 GMT). FBI agent…