Alexander (Toto) Maclean, Year 12,
Anti-Communism and Intelligence Extremism: The Career of Boris Pash
Born in 1900, Boris Pash was a US Army military intelligence officer, famous for the Alsos Mission during the Second World War, which sought to investigate and seize German nuclear resources and scientists to prevent them from going into enemy hands. He was a Russian-American who also served in post-war Japan and became known for his role in the security clearance hearing for J. Robert Oppenheimer, whom he suspected of espionage. He was a respected Colonel and mainly brought victory to the US, but his methods of interrogation and investigation were harsh, highly driven by the McCarthyism-political practice of publicizing accusations of disloyalty with insufficient regard to evidence. Some accounts suggest that his interrogation methods and security recommendations reflected the broader climate of fear and suspicion that characterized U.S. intelligence work in the early Cold War.
While Colonel Pash’s actions may have contributed to American wartime security, they also reveal a deep contradiction in his career. Take into account that Boris Pash is the son of Russian Orthodox; Theophilus Pashkovsky, and joined the Russian Army from 1916-1917 to fight against Germany and the Austro-Hungarian empire. Later on, he went back to Russia to fight the Bolsheviks in the Russian revolution in 1918, a man who had killed communists with his own hands. Yet years later, he joined the US army in 1940 to be a part of the Los Alamos mission, a top-secret intelligence operation during World War II, launched by the United States to investigate the progress of Nazi Germany’s nuclear energy and atomic bomb projects. One of the most important aspects of Pash’s career was his leadership of the Alsos Mission. Beginning in 1943, Alsos teams followed Allied forces through Italy, France, and Germany to assess how close Nazi Germany was to building an atomic bomb. Pash and his scientific partners, including physicist Samuel Goudsmit, seized laboratories, captured uranium stockpiles, and detained major German nuclear scientists such as Werner Heisenberg, one of the world’s men with the most intuitive understanding of atomic structure. The mission ultimately confirmed that Germany was not close to producing a nuclear weapon because Heisenberg was denied proper resources by Hitler as he called quantum mechanics “Jewish science”, which was said straight to Einstein’s face. This success was strategically vital because it prevented both Germany and the Soviet Union from gaining critical nuclear resources. However, the mission also showed that Pash’s work was guided not only by defeating Germany, but by limiting Soviet influence in the postwar world.
During the war, Pash was appointed head of security for the Los Alamos project in 1942 to prevent espionage, communist infiltration, and leakage of atomic secrets that could spread to the Nazis or the Soviets, however his failure to prevent leakage was blamed on controversy of J. Robert Oppenheimer on a case of communist-allegions. J. Robert Oppenheimer led the Los Alamos project in New Mexico, and wanted the help of the nation’s best scientists( such as Edward Teller, Hans Bethe and Richard Toleman) to put the United States ahead of the atomic race as the Nazis had a 18 month head start due to the US’ fast neutron research took 6 months. But Werner Heisenberg would’ve made that leap instantly. In addition, Niels Bohr was trapped in Denmark under Nazi occupation, so Oppenheimer needed everyone he could get his own hands on. Oppenheimer also appointed one of his students from Berkley (1942) as a liaison, Giovanni Rossi Lomanitz, who tried to unionize the radiation lab in Los Alamos and Berkley. When Pash found out about this, he was furious. He told the FBI he was going to kidnap him, take him out on a boat, and interrogate him in the Russian manner. And then when the FBI pointed out that such information wouldn’t be admissible in court, Pash made it clear he had “no intention of leaving any witness left to prosecute”. The FBI talked him down, but that was the man that Oppenheimer was about to dance with. An outcome that would go down in the most controversial side of history and an example of Pash’s extremism for national security. Pash began to suspect Oppenheimer greatly of espionage and interrogated him at the Presidio to discuss Eltenton; who was a chemist at Shell and wanted to obtain information about the Manhattan project through Soviet means. Oppenheimer agreed to point him out, but was reluctant to name his friend, Hakwan Chevalier(Chevalier Incident), who was a communist committing treason with Eltenton. Pash secretly recorded the interrogation without Oppenheimer knowing, and the reluctance of Oppenheimer led to further scrutiny into his personal affairs. Pash conducted a thorough search in Oppenheimer’s affair with Jean-Tatlock (a communist). This included following him wherever he went, with Oppenheimer being oblivious to the fact that his telephone was tapped, as well as his trash being searched through. Pash’s way of conducting searches to determine possible communist connections was extreme and questioned basic human privacy.
After the Second Sino-Japanese war, a security hearing was held for Oppenheimer in 1954 on the account that he was suspected that he was not entirely loyal to the United States of America, it was concluded that his security clearance was unfairly revoked based on the “confidential” information gathered by Boris Pash. During the hearing, prosecutor Roger Robb had a transcript of the conversation of Boris Pash with Dr Oppenheimer on the matter of the Chevalier incident. Oppenheimer nor his lawyer were given this transcript because it was “confidential”, but Robb read into it without any clearance. Pash’s interest in this proceeding was rather entrapment than in truth for Dr Oppenheimer. Colonel Pash was later called to the proceeding, where he gave one of the most controversial statements in Cold War history: “Subject met with and spent considerable time with one Jean Tatlock, a communist, the record of whom is attached… Results of surveillance conducted on subject indicate further possible Communist Party connections.”
Pash painted Oppenheimer to be a disloyal citizen for years, despite everything he did for the country. Oppenheimer created a great revelation of power for the United States because of his invention of the atomic bomb, and yet Pash obnoxiously refused to acknowledge Oppenheimer’s credibility. Ultimately, the hearing exposed how Colonel Boris Pash’s reliance on secrecy, insinuation, and selective evidence shaped the outcome, allowing his personal pursuit of suspicion to overshadow truth, due process, and Oppenheimer’s demonstrated loyalty to the United States.
Boris Pash’s career embodies the paradox of Cold War intelligence: a man whose fierce anti-communism and dedication to national security brought real strategic successes, yet whose extremism, secrecy, and disregard for due process ultimately contributed to one of the most unjust episodes in American history, turning suspicion into policy and sacrificing truth, fairness, and scientific integrity in the name of fear.
