Well, it depends (says the man who just got out of an ethics training class :shock: ).
If this is for your own personal collection, it's fine. I have a shot of a KC-135
from the McGuire Open House this summer that I have been using on & off
for my desktop. I Photoshopped out the crowd and the hot dog cart from
behind the a/c, and it's a pleasant picture on my PC. Would I upload it to
a.net or jetphotos? No.
That's not to say if someone wanted a copy, and knew I had worked on it, I
wouldn't give it to them, but I wouldn't pass it off as an original depiction of
the view.