During a flight on June 1st 2012 with KLM to Dallas/FtWorth, I witnessed a close flyby of an Airbus A380 of Air France. When I zoomed in, only then was to discover the type of plane was filming. Because it was cruising with a higher speed, it slowly moved out of my window view. In the last few seconds of this movie, you can see the 4 shadows of the contrails of each engine moving across the KLM wing! First time ever, I saw an A380; a nice 'premiere', don't you think? ;-)
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