National Museum of Nuclear Science & History
Irvin Mastin worked for the J.A. Jones Construction Company.
Charles L. Osborne died on December 4, 1983, in Patchegue, N.Y. at the age of 66. A native of Toston, Montana, he graduated from Beaverhead High School in Dillon, Montana.
Dennis Dwyer was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
