Freeman Dyson
“I wish you wouldn’t keep appearing and vanishing so suddenly; you make one quite giddy!”
“All right,” said the Cat; and this time it vanished quite slowly, beginning with the end of the tail, and ending with the grin, which remained some time after the rest of it had gone.
Thats about all the easy ones, plenty Russian dudes left but a little tricky finding pic clues
You are indded correct in that the picture is that of a H Bomb - I'm afraid I googled 'atom bomb' and selected this picture.
However I question that Teller be considered the father of the H Bomb - An odious man whom I believe attempted to rob Stanislaw Ulam of his rightful place as the true father of the H bomb.
Alas lazy historians and journalists have merely perpetrated this myth about Teller.
Interestingly Teller also testified against Oppenheimer as a security risk at the time of the 'Red Scares' whilst no one else did.
He even blamed Jane Fonda for giving him a heart attack...............