Resale prices for FIFA World Cup tickets continue to slide, as the organizers battle underwhelming interest in what is the biggest sporting event of the year, which kicks off on June 11. According to those charted on Ticketdata.com, prices for some of the more anticipated early games—such as the United States' opener against Paraguay —have dropped by more than 30 percent over the past month. Prices have fallen for all but two of the U.S.-hosted games and by 24 percent on average, with many