In the Marshall Island , indigenous residents and crewmembers of the fishing boat '' Lucky Dragon No. 5 '' were exposed to the high yields of radioactive testing during the Castle Bravo explosions conducted at Bikini Atoll . Researchers subsequently exploited this ostensibly " unexpected " turn of events by conducting research on the onset of effects from radiation poisoning as part of Project 4.1 , raising ethical questions as to both the specific incident and the broader phenomenon of testing in populated areas
Castle Bravo explosions
Castle Bravo
Human radiation experiments