To celebrate its 15th year, the world’s largest global airline alliance is conducting the Star Alliance 15th Anniversary Frequent Flyer Bonus, which will award 15,000 bonus miles to the top 15 frequent flyers of each of the 25 member airlines, who fly the most member airlines between May 14 and Nov. 14, 2012. Some of the frequent flyer programs, like United MileagePlus, require members to register for the promotion, while others do not. Visit http://insideflyerus.wpengine.com/link/?6643 for full information.