Mike Johnston brought the LoC to peoples attention when he started selling copies of Migrant Mother. Apparantly there's no copyright so you can reproduce the images at will, even for profit as he did.
It's an interesting exercise to download a well known image, like Migrant Mother, and see how you might print it, compared to all the other versions. I tried it a while back and here's my attempt.
I've put mine beside Mike's and the original on my Web site.
