A Greek air force plane crashed at an air show north of Athens on Saturday, killing the two pilots, officials said, as thousands of people attended the event.A fire after the crash sent up large plumes of black smoke. There were no injuries among the spectators. The crash of the twin-seat Phantom F4 jet took place during a low-altitude manoeuvre.Air force officials in Greece said the bodies of the two pilots were located during a rescue operation, hampered in the early stages by the fire on...