He's lucky to have gotten away.
Via Daily Mail:
Two knifemen are on the run after threatening a British airman outside an RAF base home to jets bombing the Islamic State.
RAF Marham, near King’s Lynn, Norfolk, was reportedly placed on lockdown after the serviceman was approached by the blade-wielding assailants at around 3.30pm yesterday.
Police would not comment on whether the incident was terror related but a source told the Sun that there was a 'strong possibility' this was a terror attack, adding 'this could've been a lot more serious'.