Nuclear testing began in 1946 on Bikini Atoll after residents were evacuated. Over the years, 67 weapon tests were conducted, including the 15-megaton Castle Bravo hydrogen bomb test, which produced significant fallout in the region. The testing concluded in 1958. Over the years, just one of over 60 islands was cleaned by the U.S. government, and the inhabitants are still waiting for the 2 billion dollars in compensation assessed by the Nuclear Claims Tribunal. Many of the islanders and their descendants still live in exile, as the islands remain contaminated with high levels of radiation.