Federal agents have searched several Western Washington locations in an expanding investigation of two Pakistani men arrested at Seattle-Tacoma International Airport on Saturday after their names appeared on terrorism watch lists. Agents also have scrutinized passenger lists for possible associates of the men on the American Airlines and JetBlue flights for which they tried to buy tickets. The men, who bought one-way tickets with cash, have not been charged with a crime and have not been publicly identified. One, a 29-year-old with a New York driver's license, had been detained and released at an unnamed airport once before and had...