А вот и пресс-релиз Федеральной авиационной администрации:)
The Federal Aviation Administration today announced that Santa One, the reindeer-powered sleigh Santa Claus uses to deliver presents to good children around the world, has been cleared for its worldwide Christmas Eve flight. Santa One will be faster, quieter and more efficient this year with the help of NextGen technologies being rolled out by the Federal Aviation Administration (FAA).
This year, Santa will fly from a cruising altitude of 50,000 feet down to rooftops using a satellite-based procedure called an Optimized Profile Descent. In the past, Santa had to rely on ground-based procedures to descend slowly from one altitude to the next, much like going down a staircase. The Optimized Profile Descent allows Santa to slide gleefully through the air as if riding down the banister, just as some children do on Christmas morning, descending smoothly and gracefully without having to throttle back on Rudolph and the other reindeer.
