 Intelligence gathering sorties by the RB-57's in West Germany continued until 1964 when wing fatigue problems caused type to be withdrawn from service.The RB-57Ds of the 4926th Test Squadron (later 1211th Test Squadron) at Kirtland AFB, New Mexico, participated in support of atomic bomb tests at Eniwetok Atoll in the Marshall Islands and at the AEC testing range in Nevada during 1957–1963.The high flying capability of the RB-57Ds allowed them to get nuclear particle samples from high in the atmosphere as part of the post-detonation analysis.