John M. Purdum

Horace E. Mahorney

Horace Mahorney was a chemical engineer at the Y-12 plant in Oak Ridge, Tennessee. From September 1943 to November 1945, Mahorney was an operator of the mass spectrometer with Dr.

Joseph Halperin

Attended the University of Chicago.

Regina “Reggie” Behl

Regina “Reggie” Behl (1922-2011) was an art teacher in Oak Ridge, Tennessee during the Manhattan Project.

John F. Cassidy