Headscratchers / Blood Waters of Dr. Z

• How exactly did Leopold, implied in one scene as being as an ex-Nazi scientist and quite possibly a wanted war criminal, manage to set up shop in Florida under his own name?
  • Leopold was probably a part of Operation Paperclip.
  • His American accent is pretty good during his monologue, maybe he snuck in under a fake identity and only went back to using his real name after he thought nobody would care anymore? (Which is still pretty dumb, admittedly.)
• The whole reason for "ZaAt"'s weird punctuation is that, according to Leopold, it stands for "Z sub A, A sub t". What the hell does that mean?