The correct answer to this open question is the following.
The author has to revise this paragraph to make it more powerful and conclusive. He should add a more explanatory paragraph so the reader can get a powerful final idea of what is trying to say.
Those data regarding the number of deaths and victims are all right. However, the author needed to include some comparative references similar to the data included, but now, as the tragic consequences of having launched the nuclear bombs over Hiroshima and Nagasaki. This means, not only opinions or already known consequences but facts, data, numbers, statistics, quantitative information that can be compare3d with the "advantages" of having launched the bombs.