I agree with Moose's explanation. I remember seeing the effect in
the sixties on a US internal
flight in a Vickers Viscount, and was told it was normal in humid conditions.
Subject: [OM] Fog on Flight 1107
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I'm back from a week in south Florida, attending and photographing my
cousin's wedding. Here's what awaited us on the flight back. Spooky.
iPhone 5 photo.
Themed Olympus Photo Exhibition: http://www.tope.nl/