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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from U. S. Project Trinity Report by Carl Maag and Steve Rohrer: made three trips into the ground zero area received the highest
exposure, 15 roentgens (1).
This lead-lined tank was also used by ten men to observe the radiation
area. These men, traveling two at a time, made five trips into the
area on shot-day but never approached closer than 1,370 meters to
ground zero. The highest exposure among these ten men was 0.3
roentgens (1).
The next party to approach ground zero consisted of a photographer and
a radiological safety monitor. Wearing protective clothing and
respirators, the two men were about 730 meters northwest of ground
zero photographing "JUMBO" from 1100 to 1200 hours. "JUMBO," shown in
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