Police say they found no threats on board a Southwest Airlines flight after it arrived at Salt Lake City International Airport last night.  Law enforcement searched the plane after a note with a threat was found by a passenger on the flight from San Jose.  Passengers were held on board while officers and canine units cleared the plane.  The airline now says the note was a non-credible threat and that standard procedure was followed, including keeping the plane away from the terminal while it was searched.

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