Citibank and American Airlines will observe the 10th anniversary of their AAdvantage Visa card by giving away 10 million miles in a six-month sweepstakes from July through December.

Each month, 150 winners will receive 10,000 miles each. A grand prize winner-to be chosen in February-will receive a first-class trip to Europe on American Airlines, hotel accommodations with Radisson Hotels, a seven- day Avis car rental, and a $10,000 credit to the Citibank AAdvantage account.

Ten first-prize winners will get 100,000 AAdvantage miles, and 50 others will receive $50 MCI/AAdvantage prepaid calling cards.

Cardholders automatically will receive one entry into a monthly drawing and an entry in the grand prize drawing each time they use their card.

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