Incheon International Airport, the main gateway to Seoul, ranked first worldwide in international passenger traffic in the first half of this year, handling more than 38 million passengers, the airport operator said Thursday.This marks the first time the country's main gateway has topped the global ranking since it opened in 2001.The airport handled 38.39 million international passengers in the January-June period, up 6.3 percent from a year earlier, according to Incheon International Airport Corp. (IIAC).It was the highest figure among 1,234 airports worldwide, based on preliminary statist…READ FULL ARTICLE