The largest air mileage giveaway in history is underway. Between now and Jan. 8, Citibank and American Airlines will award one million miles per day. In all, Citi and AA will give away 100 million AAdvantage air miles. Every time cardholders of the Citibank American Airlines AAdvantage MasterCard make a purchase, they are automatically entered for a chance to win. From all the entries received each day through January 8, 2001, ten cardholders will be randomly selected and awarded 100,000 miles. Under the AAdvantage standard MasterCard program, cardholders may earn up to 60,000 miles per year. However AAdvantage Executive Platinum, AAdvantage Platinum and AAdvantage Gold cardholders may earn up to 100,000 miles per year. For more details and sweepstakes rules, cardmembers may visit www.100millionmiles.citibank.com.