This is apparently because thermonuclear weapons are important national secrets and the government did not allow details to be shown. This diagram also appears in the Nuclear Issues Handbook 2020 ...
Here's a Nukemap simulation of what might have been the blast radius and fallout zone of the Goldsboro incident: Both bombs were a thermonuclear design. So instead of just one nuclear core ...
The ability to confine alpha particles within a burning deuterium–tritium plasma is likely to be crucial to the future of fusion power generation. Resonant interactions between alpha particles ...