The bravest me the world has ever known: Liquidators sent to the rooftop of the destroyer Reactor 4, to replace German-made robots that broke down due to the heavy exposure to radiation, as that place needed to be cleaned up from all the radioactive debris expelled from the explosion of the reactor in order to allow construction crews to finish the Sarcophagus, the structure designed to contain the building and stop the spread of radiation to the atmosphere.
Here you can see them alongside one of the broken robots, and hence their name, Biorobots, since they had been sent to a place deemed only suitable for robots, not humans nor any other living being.
The completion of the Sarcophagus was for them what flying the Soviet flag over the Reichstag meant to the Red Army: Total victory over a ruthless, savage enemy.
And they actually raised their own flag once it was completed, a symbol of their battle over the atom.
