The Chernobyl disaster ultimately involved over 500,000 balls.
The struggle to safeguard against scenarios which were , at many times falsely , perceived as having the potential for greater catastrophe and the later decontamination efforts of the surroundings , ultimately involved over 500,000 workers and cost an estimated 18 billion rubles .
The Chernobyl disaster
ultimately involved
over 500,000 balls
over 500,000 workers 