The Marshallese case is unusual when compared to the Hanford Reservation. In both these cases, the authorities were not admitting full disclosure to the citizens who were involved in living near or in contaminated areas. The Hanford Reservation though was in the continental United States and had educated citizens who were willingly participating themselves in work related to manufacturing radioactive weapons. These citizens were ex-military personal and brought their families to live in a place that they thought would be safe and taken care of by the country they took pride in serving. In many respects, this contrasts to the Marshallese experience because the Marshallese were an economically and culturally disadvantage population that had very little power in the decisions about nuclear experimentation in their homeland. In one example we have a foreign culture being taken advantage of due to their lack of information and education on the culturally/technologically advanced ways of the United States - but they still wanted to do the right thing and help - and this led to them being taken advantage of. In the Hanford Reservation example, the people who were involved were educated citizens of the USA but were still naïve in the same way as the Marshallese and believed in the American government to be transparent in "doing the right thing," this led to them being taken advantage of. Though they were still more educated and had better access to information, they - lower-level employees - were still not adequately informed.
I found by studying these cases that the government doesn't have a particular racial or cultural group that it is willing to sacrifice. The people who fell victim to these events ranged in gender, race, culture, and location. It seems the government merely wanted to put the events far enough away from elite classes and populated areas, except in Japan's case - which was the most unique out of them all I think. The wanted to see the effects on citizens who were not aware of the impact that the poison could have. It's a shocking read even to someone who assumes that the side effects to poor minorities aren't a concern when it comes to technological and national/military advancement.