AAL Flight 648 from SFO to PHL landed normally and was then directed to a remote area of the airport because of a bomb threat that was phoned into the FAA. The crew knew nothing about the threat until told by the tower after landing. A search of the aircraft and luggage proved negative.
[url]http://flightaware.com/live/flight/AAL648/history/20150602/0525Z/KSAN/KPHL/url]