J. J. DiLeonardo

Charles Robert Emigh

Bob Emigh was in the Navy and worked with Deak Parsons on telemetry for the bombs. He was assigned as the science officer for the planned third bomb.

Ernest L. Arterburn

Ralph Brooks

Ralph Brooks worked for the Tennessee Eastman Corporation at the Y-12 Plant.

H. P. Hanisch

Hanisch worked at the 300 Area at Hanford during the Manhattan Project.