During the Castle Bravo test of the first deployable thermonuclear bomb, a miscalculation resulted in the explosion being over twice as large as predicted. The nuclear fallout spread eastward onto the inhabited Rongelap and Rongerik Atolls. These islands were not evacuated before the explosion. Many of the Marshall Islands natives have since suffered from radiation burns and radioactive dusting, suffering the similar fates as the Japanese fishermen aboard the ''Daigo Fukuryū Maru'', but have received little, if any, compensation from the federal government.