A flight leaving McCarran International Airport today, stopped before takeoff after it received a non-credible threat. The pilot of the American Airlines flight stopped the plane on the tarmac and asked to have a security check of the plane. Dogs were used to sweep the cargo area and all the luggage and all passengers were rescreened by the TSA. The plane and passengers sat on the tarmac for several hours. Nothing suspicious was found and the flight eventually took off for Charlotte.