The U.S. Department of Energy Republic of the Marshall Islands Special Medical Care and Logistics Program provides annual medical screening examinations and care for members of the population of Rongelap and Utrik exposed to radiation resulting from the 1954 U.S. thermonuclear weapons test code-named "Castle Bravo." There were 253 people on Rongelap and Utrik during the 1954 test. There were 105 individuals eligible for participation in the program as of October 1, 2016.