Fogy, cool day, one CARBURATED enging at altitude, carb. icing starts, no heat applied or applied too late, aircraft loses power, lands/ditches/crashes in the chanel, crew lost. No one seen because of the fog. Was quite common then, still happens now. No space aliens, etc. .
In the Mood is a great tune, and Miller's Band did it exceptionally well.
Also, add "The Ventures" as a channel on your Pandora, great mix of instrumental only Rock.