Read the excerpt from the report compiled by the Manhattan Engineer District of the United States Army published June 29, 1946, to answer the question.
This excerpt discusses the effects of the atomic bombings on the inhabitants of Hiroshima and Nagasaki. Select the phrase that explains what sight caused the terror Japanese people experienced after the bombings.
Aside from physical injury and damage, the most significant effect of the atomic bombs was the sheer terror which it struck into the peoples of the bombed cities. This terror, resulting in immediate hysterical activity and flight from the cities, had one especially pronounced effect: persons who had become accustomed to mass air raids had grown to pay little heed to single planes or small groups of planes, but after the atomic bombings the appearance of a single plane caused more terror and disruption of normal life than the appearance of a single plane caused more terror and disruption of normal life than the appearance of many hundreds of planes had ever been able to cause before. The effect of this terrible fear of the potential danger from even a single enemy plane on the lives of the peoples of the world in the event of any future war can easily be conjectured.
persons who had become accustomed to mass air raids had grown to pay little heed to single planes or small groups of planes
after the atomic bombings the appearance of a single plane caused more terror and disruption of normal life