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National Museum of Nuclear Science & History

Howard Rosenthal served in the First Ordnance Squadron.

Related Profiles

Carl Helmholz

University of California, Berkeley

Carl Helmholz (1915-2003) was an American physicist involved with the Manhattan Project.  Helmholz was born on May 24, 1915 in Evanston, Illinois.

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Dr. Alexander Langsdorf (1912-1996) was an American physicist who worked under Enrico Fermi at the University of Chicago.

Mary Lou Curtis

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Mary Lou Curtis joined the Manhattan Project in Dayton, Ohio in 1943. Mrs. Curtis worked in the Counting Room at Monsanto’s Unit III facility, where she developed new methods to measure and analyze radioactive materials, such as polonium, which was used as the trigger for the atomic bombs.

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R. A. Holmes worked for the Westinghouse Electric Company.