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Theodore Alvin Hall
Hall's ID badge photo from Los Alamos
Born	Theodore Alvin Holtzberg October 20, 1925(1925-10-20) Far Rockaway, USA
Died	November 1, 1999 (aged 74) Cambridge, England
Cause of death	Cancer
Education	Harvard University University of Chicago[1]
Employer	Manhattan Project
Known for	Atomic spy

Theodore Alvin Hall (October 20, 1925 – November 1, 1999) was an American physicist and an atomic spy for the Soviet Union , during his work on Allied effort to develop the first atomic bombs during World War II (the Manhattan Project), gave a detailed description of the "Fat Man" plutonium bomb, and of processes for purifying plutonium, to Soviet intelligence.^[2] His brother, Edward Hall was a leading rocket scientist who worked on ICBMs.

Biography

Theodore Alvin Holtzberg was born in Far Rockaway, New York City, but his family soon moved to Washington Heights in Upper Manhattan. While his father struggled to find work during the Great Depression, he changed both his and Theodore's last name to Hall in an effort to avoid anti-Semitic hiring practices.

Hall attended Public School 173 in Washington Heights during the Depression and then Harvard University. He graduated at the age of 18, and at the age of 19 was recruited to the Manhattan Project, where he was the youngest scientist at Los Alamos.^[3] While on a vacation back to his hometown, he entered a Soviet consulate in New York City and volunteered to pass information on the bomb project to the Soviet government. After his death, his wife Joan said that he had begun to adopt strong feelings current at the time against the possibility of an emerging, militarized United States with a nuclear monopoly very early in his Los Alamos work.

Unbeknownst to Hall, Klaus Fuchs, a Los Alamos colleague, and others still unidentified were also spying for the USSR; none seem to have known of the others. Saville Sax and Lona Cohen acted as Hall's couriers. Some of their information provided an independent and confirming source for the others.

Hall, with the help of his Harvard friend Saville Sax, who had open Communist sympathies, together visited New York, where Hall, after some searching, arranged a meeting with a Soviet diplomat. He presented a detailed sketch of the "Fat Man" nuclear device to the official, who transmitted the information to the NKVD from New York using a one-time pad cipher. Hall's code-name was MLAD, a Slavic root meaning "young".

Until recently, nearly all of the espionage regarding the Los Alamos nuclear weapons program was attributed to Klaus Fuchs. Hall was questioned by the FBI in 1951, but he was not charged. Alan H. Belmont, the number-three man in the FBI, decided that the Venona project would be inadmissible as hearsay evidence and not worth compromising the program.

In a written statement published in 1997, he came close to admitting that the accusations against him were true, although obliquely, saying that in the immediate postwar years, he felt strongly that "an American monopoly" on nuclear weapons "was dangerous and should be avoided."

"To help prevent that monopoly I contemplated a brief encounter with a Soviet agent, just to inform them of the existence of the A-bomb project. I anticipated a very limited contact. With any luck it might easily have turned out that way, but it was not to be."

He repeated this near-confession in an interview for a Cold War documentary on CNN in 1998, saying "I decided to give atomic secrets to the Russians because it seemed to me that it was important that there should be no monopoly, which could turn one nation into a menace and turn it loose on the world as ... as Nazi Germany developed. There seemed to be only one answer to what one should do. The right thing to do was to act to break the American monopoly."

Hall left Los Alamos for the University of Chicago, where he switched to biology. There he pioneered important techniques in X-ray microanalysis. He went to work at Cambridge University in England in 1962. Hall later became active in obtaining signatures for the Stockholm Peace Pledge.

On November 1, 1999, Theodore Hall died in Cambridge, England. He had suffered from Parkinson's disease, although he died of renal cancer at the age of 74.^[3]

References

External links

• FBI Memo Prosecution: Disadvantages (1 February 1956)
• "A Memoir of Ted Hall" by Joan Hall, his wife
• Los Alamos National Laboratory: History: Spies
• Annotated bibliography for Theodore Hall from the Alsos Digital Library for Nuclear Issues