Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

Delbert Johnson was a mechanical engineer with the Special Engineer Detachment (SED) at Los Alamos. Johnson worked under 1st Lieutenant Howard C. Bush and witnessed the Trinity site explosion on July 16, 1945. After the bomb test, Johnson was one of the first to enter the crater to conduct scientific measurements.  

A Commendation for Delbert Johnson from President Harry Truman

Related Profiles

Leonard Krouldis

Chicago, IL

Leonard Krouldis was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Edward H. Fieder

Los Alamos, NM

R. L. Thornton

Y-12 Plant

R. L. Thornton worked for the Tennessee Eastman Corporation at the Y-12 Plant.

Robert W. Bennett

X-10 Graphite Reactor

Attended the University of Vermont.