T;DR version: author proposes that the Roswell crash in 1947 involved experimental US craft of some kind, with Japanese POWs and disabled people being used as test pilots/guinea pigs. The rumored bodies recovered would, in this account, have been humans, not aliens, and the potential for public outcry was deemed serious enough to let people run with the alien version of the story instead. Not sure I believe it, but it’s more plausible than some things.
Starting Small, Dreaming Big
Jaglion Press 