Leland F. Pettengill

Vergil E. Meeker

L. V. Swanson

Arthur “Pete” V. Peterson

Colonel Arthur “Pete” V. Peterson was the Army’s area engineer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Margaret Caldes

Margaret Caldes moved to Los Alamos when her husband, William E. Caldes, was recruited to join the project in 1943.