The Nazi's were always interested in developing special weapons that they could use. The Bell was one of those projects. How important was the Bell project? It is said that Kammler had more than 60 scientists associated with the project executed to protect it's secrecy.
The second stage engines fired immediately. The flames cut into the first-stage fuel tanks below and they exploded. Automatically-activated cinema cameras set around the launching pad filmed the explosion. People near the rocket were instantly incinerated; those farther away were burned to death or poisoned by the resulting toxic gases. As soon as the engines were fired, most of the personnel there ran to the perimeter but were trapped in it by the security fence and then engulfed in the fireball of burning fuel. Nedelin and 125 other rocket personnel were killed.