My men killed all the radroaches BUT one. I had to use a lot of stimpacks to save the 4 people shooting it, but it never died. I had to evacuate them, and send in new people. They could not kill it either. Then i ran out of people who could actually fight it, and it spread, now everyone in my shelter is dead and im basically game over. BECAUSE 1 ROACH COULD NOT BE KILLED!!!