Marshall Glecker Holloway ( November 23 , 1912 – June 18 , 1991 ) was an American physicist who worked at the Los Alamos Laboratory during and after World War II . He was its representative , and the deputy scientific director , at the Operation Crossroads nuclear tests at Bikini Atoll in the Pacific in July 1946 . Holloway became the head of the Laboratory 's W Division , responsible for new weapons development . In September 1952 he was charged with designing , building and testing a thermonuclear weapon , popularly known as a hydrogen bomb . This culminated in the Ivy Mike test in November of that year
Ivy Mike
Ivy Mike
Marshall Holloway