Fay Eliason Millward signed Fat Man that was dropped on Nagasaki.

In doing a search for Herbert Lemay, I came across something quite unexpected.  A picture of the tail of Fat Man with H. P. Lemay's name right above F. E. Millward.  Apparently my grandfather signed the bomb.

See the video and picture below.

You can see Fay sign the bomb at about 20 seconds into the video.