Henry Clausen

He decided to write the book Pearl Harbor: Final Judgement in 1991 (published in 1992) in opposition to what he described as “inaccurate conspiracy theories” of the Pearl Harbor attack.

Clausen, a lawyer and a former Assistant United States Attorney from San Francisco, and a "civilian at heart" had joined up "for the duration" of the war, being discharged in August 1945. He was not a Reserve officer. He had been the Trial Judge Advocate for the Army at the (well publicized) court martial of Army inspectors for fraudulent inspections of aircraft engines at the Wright Aeronautical engine manufacturing facility in Lackland, Ohio.

Lieutenant Colonel Carlisle Clyde Dusenbury was the Army G2 (Intelligence) officer at the Japan desk in Washington on Saturday 6 December 1941.

Lieutenant Commander Alwin D. Kramer was the US Navy translator in Washington on Saturday 6 December 1941. He was also responsible for distributing MAGIC information to the President; though unlike the Army (with Dusenbury and Bratton) he had no relief officer.

Henry Christian Clausen (30 June 1905 – 4 December 1992) was an American lawyer, and investigator. He authored the Clausen Report, an 800-page report on the Army Board's Pearl Harbor Investigation. He traveled over 55,000 miles over seven months in 1945, and interviewed nearly a hundred personnel, Army, Navy, British and civilian, as a Special Investigator for the Secretary of War Henry L. Stimson carrying out an investigation ordered by Congress of the Secretary of War.