I am sure is fake.
Because I know ...
That first flight was here 12/1/10 and 13/2/10 says that it is.
1) If so then it has become to the same cloud?
2) How have join the same snow by far one month?
3) The photos are different, but it is a PS to camouflage
4) If you see that has the same white trees by far one month
5) Is the same flight path, the same angle off
6) Surely the photographer caught with a camera several frames [(maybe Canon EOS-1D Mark II (8.3 fps)] from the same point.
7) ect, ect :P
Sorry for my bad english