Devil's Advocate
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In my experience Atlas Air normally looks like thisAtlas going to MEX. Nothing spooky going on, they fly through AUS all the time. And yes they have proper registration.
But a quick check of the web indicates that they now have at least a few aircraft that appear to be in some sort of witness protection (or wet lease) program.
Depends on what sort of fleet you're operating and which aircraft are available within that fleet. Right now 744's are paid off and fossil fuel is cheap. Thus you have a 747 replacing a 787 from Austin to London.A surprise to me too. Aren't 747s,even the newer versions, Fuel Hogs like all 4 engine jets? I may just have to take a day trip to London just to ride on a 747 again!BA replacing the 787 on their flight with a 747? That is very unusual. Many other airlines are retiring their 747s for newer aircraft - like the 787!