Pakistani officers arrested a man at Karachi airport after batteries and an electrical circuit were found in his shoes as he tried to board a plane for the Middle East, an official said. The 30-year-old civil engineer allegedly told interrogators he came from Pakistan's northwestern province Khyber Pakhtunkhwa, where Taliban and Islamist militants have a presence, and had been scheduled to travel to Muscat by Thai Airways. Mohammad Munir, Airport Security Force spokesman, said the bearded man, whom he named as Faiz Mohammad, was arrested when a scanner sounded an alarm. The suspect was not found in possession of explosives,...