Among them, there are shots of cavalry passing through the center of the explosion (in order to prevent radioactive substances from entering people or horses, both people and horses wear gas masks).

The full version of the relevant documentary should be available online. When I was a child, my teacher used a small film projector to show some of these documentaries. Don't talk about DVD at that time, even video recorders were a rarity. )

At that time, various military or civilian equipment or buildings were set up at a certain distance from the explosion center, and then experimental animals such as dogs, pigs and monkeys were put into them to observe the radiation resistance and impact resistance of various equipment and buildings.