PARIS - Police at Paris' top airport lost track of a passenger's bag in which plastic explosives were placed to train bomb-sniffing dogs, police said Saturday. Warned that the bag may have gotten on any of nearly 90 flights from Charles de Gaulle, authorities searched planes upon arrival in Los Angeles and New York. French police said the explosives were harmless and there was no chance of their going off, since no detonators were connected to them. More than 300 passengers were evacuated and their luggage searched when their Air France flight from Charles de Gaulle arrived in Los Angeles...