Sat 05 May 2004Greece's captivating second city has nothing to proveLetter from Thessaloniki Patrick ComerfordSecond cities exude an air of elegant confidence that lets everyone know that, unlike their pushy rivals in the capital, they have nothing to prove - Milan, Alexandria, Kyoto, even Cork.Thessaloniki is a confident and elegant Greek second city, happy to play Olympic host to soccer alone. Instead, Thessaloniki is content to continue attracting visitors each year to events such as the flower show in May, the book festival in June, the international trade fair in September, the wine festival in October, or the film festival in November.