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National Museum of Nuclear Science & History

Leo A. Ortega, Jr.

Master SergeantTinian Island

Wendover, UT
509th Composite GroupManhattan Project VeteranMilitary Veteran
North Airfield at Tinian Island.

Leo A. Ortega, Jr. served in the 393rd Bombardment Squadron.

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Hanford, WA

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Attended the University of Toledo.

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Tinian Island

Thaddeus J. Seweryniak served in the First Ordnance Squadron.

Chien-Shiung Wu

Columbia University

Chien-Shiung Wu (1912-1997) was a Chinese American physicist. During the Manhattan Project, she worked at Columbia University, helping develop the process for separating uranium metal into U-235 and U-238 isotopes by gaseous diffusion.