National Museum of Nuclear Science & History
Gerhardt Padalski was a staff worker at Los Alamos during the Manhattan Project.
Walter Groeger worked in the shop at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Crenner worked at the 300 Area at Hanford during the Manhattan Project.
Leslie Ritner was a member of the Special Engineer Detachment at Los Alamos. He was among the first engineers sent to Los Alamos from Camp Claiborne, Louisiana in late January 1944, serving for two years before being discharged in the spring of 1946.
