American Airlines equipped several airplanes that conducted airborne tests with the Federal Aviation Administration's Miami air-traffic control center.

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The vibe is sophisticated but not at all precious, consistent with that of the resort itself. (ESPA is open to Acqualina residents, guests and nonguests alike, but you'll never notice the foot traffic.) It's Miami all grown up, but not grown old.

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"We're working together to make sure safety is not going to be affected, but unfortunately, you might want to buy 'War and Peace' before you get on your next flight, " said Miami controller Jim Marinitti, a representative of the National Air-Traffic Controllers Association, the union representing all FAA controllers.

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