Oh, the Library of Congress....! Always new and wonderful things to discover. My most recent discovery is their collection of colour photographs from the 1930s and World War Two (here). I always find it especially fascinating to see colour from decades when colour wasn't yet predominant; it brings it all closer, in a way.
This selection is of pilots and student pilots in World War Two-- some of them are with the Navy or Marines learning/teaching glider piloting (though I confess to not being sure what you would use gliders for in this context).
Marine lieutenant pilot with plane. Source
Marine Corps lieutenant pilot with glider plane. Source
Student pilots. Source
Cadet L. Deitz of the Naval Air Force. Source
Bomber pilot captain. Source