1954 March Evacuated Utirik Rongelop and Detonation BRAVO 1957 1954 June WBC at InSity' "First June April 1958 1962 1963 - 1958 May Atmospheric Testing U.S.S.R. , U.K. Peak U.S. Detonation CACTUS April - August 1958 Hordtack Phase I Reinhabited Rongelap Rongelap Utirik Reinhabited March - May 1954 Castle Series [ August 1981 ond Utirik Recent WBC Survey at Rongelop June 2072 Levels Kadiotion Estimated Return to Bock ground