In this frame grab taken from WABC-TV video, passengers disembark an Emirates airliner into an awaiting bus at John F. Kennedy International Airport in New York, Friday Oct. 29, 2010, after having been escorted from the Canadian border to New York City by two military fighter jets. U.S. officials said there is no known threat associated with the plane, but it was being escorted to JFK as a precautionary move. Authorities on Friday were investigating whether suspicious packages shipped aboard cargo planes from Yemen to the U.S. were part of a terrorist plot