Much of the LoC archives has been scanned into digital format.
This includes a huge and diverse collection of WWII aviation photos, in color and B&W. You can download the images at various resolutions, from 100 kb to a whopping 200 megs!
Just go
here and type whatever you are interested in seeing into the search box and off you go. A person could spend days looking at the countless images and documents on the LoC servers.
Here's a few beauties I found in a few minutes.

This P-40 is just about to crash, caught by an alert photograper.

Note the French insignia of the Free French Air Force.
My regards,
Widewing